Adjudicated sub-region code 7-digit code (3-digit country code + region ID + stratum ID)
0320000 = Argentina - Rest of the country (not adjudicated)
7240000 = Spain - Rest of the country (not adjudicated)
7840000 = UAE - Rest of the country (not adjudicated)
8260000 = United Kingdom - England, Wales & Northern Ireland
0560000 = Belgium - French & German regions (not adjudicated)

Stratum ID 7-character (cnt + region ID + original stratum ID)
ALB0010 = ALB - stratum 10 : South, Urban, Private
MAC0010 = MAC - stratum 10 : Stratum 10: Private-not- in-Net, Grammar-International, Chinese and English
SWE0010 = SWE - stratum 10 : INDEP/ LOWER SEC/ MANUFACTURING
PRT0010 = PRT - stratum 10 : Centro - Beira Interior Sul
AUT0010 = AUT - stratum 10 : TYPE 10 BMS kaufmännisch
URY0010 = URY - stratum 10 : Rural Schools with Lower Secondary Degree,Lower secondary only
KAZ0010 = KAZ - stratum 10 : Almatinskaya oblast, Kazakh and other or uighur
GBR2010 = QSC - stratum 10 : Scotland 10-independent/second highest band
ARE0110 = ARE - stratum 10 : ABU DHABI,OTHER,PRIVATE
BEL0110 = BEL - stratum 10 : Flanders/Gen Ed and other type/network comm. Schls/ISCED2
TAP0110 = TAP - stratum 10 : Voc. Sr. HS. Pub. Urb.
GBR1110 = QUK - stratum 10 : England, Independent, Midlands
MEX9110 = MEX - REGION 91 stratum 10 : [NO Region 99 and above] CONALEP-Prof. Tech. Pub.
THA0210 = THA - stratum 10 : Bureau of Local Educational Development and Co-ordination/Mixed
CHL0210 = CHL - stratum 10 : Subsidized / Primary andSecondary / TP
VNM0210 = VNM - stratum 10 : Central Viet Nam / Private / Urban
CAN0210 = CAN - stratum 10 : prov 11 Fr.& Eng. 0 to ...
DEU0210 = DEU - stratum 10 : Nordrhein-Westfalen (NW) /NOR
ITA1310 = ITA - REGION 13 stratum 10 : [Region 13] Veneto (Rovigo) Formazione Professionale
BRA0410 = BRA - stratum 10 : AMAZONAS - FEDERAL/ESTADUAL
MEX0410 = MEX - REGION 04 stratum 10 : CAMPECHE, large schools
ESP0510 = ESP - stratum 10 : CanaryIslands, private, NA
TUR0020 = TUR - stratum 20 : TR6 VOCATIONAL AND TECHNICAL SECONDARY
PRT0020 = PRT - stratum 20 : Lisboa - Península de Setúbal
KAZ0020 = KAZ - stratum 20 : East-Kazakhstan oblast, russian only
ESP1020 = ESP - stratum 20 : Extremadura, private, NA
BEL0120 = BEL - stratum 20 : Flanders/Special Ed/network comm. schls
GBR1220 = QUK - stratum 20 : Northern Ireland, Maintained selective, Western
BRA0720 = BRA - stratum 20 : DISTRITO FEDERAL - PRIVADA
MEX0720 = MEX - REGION 07 stratum 20 : CHIAPAS, moderately small schools
PRT0030 = PRT - stratum 30 : Região Autónoma dos Açores
KAZ0030 = KAZ - stratum 30 : West-Kazakhstan oblast, russian only
MEX1030 = MEX - REGION 10 stratum 30 : DURANGO, very small schools
BRA1130 = BRA - stratum 30 : MATO GROSSO - FEDERAL/ESTADUAL
ARE0330 = ARE - stratum 30 : SHARJAH,OTHER,PRIVATE
KAZ0040 = KAZ - stratum 40 : Kyzyl-Ordinskaya oblast, both
MEX1440 = MEX - REGION 14 stratum 40 : JALISCO, large schools
ESP1840 = ESP - stratum 40 : CeutaandMelilla, private, NA
KAZ0050 = KAZ - stratum 50 : South-Kazakhstan oblast, kazakh only
MEX1750 = MEX - REGION 17 stratum 50 : MORELOS, moderately small schools
CZE1850 = CZE - stratum 50 : 6-8yrGym/Region4/MSS andVSS
MEX2060 = MEX - REGION 20 stratum 60 : OAXACA, very small schools
BRA2160 = BRA - stratum 60 : RIO GRANDE DO SUL - FEDERAL/ESTADUAL
CZE2360 = CZE - stratum 60 : 6-8yrGym/Region9/MSS andVSS
ARE0660 = ARE - stratum 60 : RAS AL KHAIMAH,OTHER,PRIVATE
CAN0760 = CAN - stratum 60 : prov 46 Eng. 0 to 17
BRA2470 = BRA - stratum 70 : SANTA CATARINA - MUNICIPAL
MEX2470 = MEX - REGION 24 stratum 70 : SAN LUIS POTOSI, large schools
ARE0770 = ARE - stratum 70 : FUJAIRAH,OTHER,PRIVATE
CAN0870 = CAN - stratum 70 : prov 47 Eng. 0 to 17
CZE2870 = CZE - stratum 70 : 6-8yrGym/Region14/MSS andVSS
CZE3280 = CZE - stratum 80 : Special/practical/Large
MEX2780 = MEX - REGION 27 stratum 80 : TABASCO, moderately small schools
CAN0980 = CAN - stratum 80 : prov 48 Eng. 0 to 17
CAN1090 = CAN - stratum 90 : prov 59 Eng. 0 to 17
MEX3090 = MEX - REGION 30 stratum 90 : VERACRUZ, very small schools
MAC0001 = MAC - stratum 01 : Stratum 1: Public, Grammar-International, Chinese and Portuguese
SWE0001 = SWE - stratum 01 : PUB/ LOWER SEC/ METRO
CRI0001 = CRI - stratum 01 : Public/ academic/ urban
IRL0001 = IRL - stratum 01 : Size <=40 / Community/Comprehensive
QCN0001 = QCN - stratum 01 : ISCED2/General/no selectivity
NOR0001 = NOR - stratum 01 : Lower secondary schools
PRT0001 = PRT - stratum 01 : Alentejo - Alentejo Central
AUT0001 = AUT - stratum 01 : TYPE 1 Pflichtschulen
HRV0001 = HRV - stratum 01 : Four year vocational prog.
URY0001 = URY - stratum 01 : Public General Secondary Schools and Military School,Lower secondary only
KAZ0001 = KAZ - stratum 01 : Akmolinskaya oblast, kazakh only
ITA1001 = ITA - REGION 10 stratum 01 : [Region 10] Sardegna Licei
SVN1001 = SVN - stratum 01 : GIMg - gymnasia general
ITA2001 = ITA - REGION 20 stratum 01 : [Region 20] Umbria Licei
GBR2001 = QSC - stratum 01 : Scotland 1-public/lowest band
THA0101 = THA - stratum 01 : Office of the Basic Education Commission/Lower secondary
BRA0101 = BRA - stratum 01 : ACRE - FEDERAL/ESTADUAL
ITA0101 = ITA - REGION 01 stratum 01 : [Region 01] Bolzano Licei
BEL0101 = BEL - stratum 01 : Flanders/Gen Ed only/private subsidized/ISCED2
CHL0101 = CHL - stratum 01 : Municipal / Primary / Only Primary
NZL0101 = NZL - stratum 01 : Stratum 1:Large schools (250+)
VNM0101 = VNM - stratum 01 : North Viet Nam / Public / Urban
CAN0101 = CAN - stratum 01 : prov 10 Fr.& Eng. 0 to 17
JPN0101 = JPN - stratum 01 : 01: Public and Academic
SVN0101 = SVN - stratum 01 : GIMg - gymnasia general
TAP0101 = TAP - stratum 01 : Gen. Jr. HS. Pub. Rur.
ESP0101 = ESP - stratum 01 : Andalusia, public, NA
KOR0101 = KOR - stratum 01 : Stratum 1: Lower secondary/General
MYS0101 = MYS - stratum 01 : MOE Fully Residential School
DEU0101 = DEU - stratum 01 : Baden-Württemberg (BW) /NOR
MEX0101 = MEX - REGION 01 stratum 01 : AGUASCALIENTES, large schools
ITA1101 = ITA - REGION 11 stratum 01 : [Region 11] Sicilia Licei
SVN1101 = SVN - stratum 01 : GIMg - gymnasia general
GBR1101 = QUK - stratum 01 : England, Maintained selective, North
ITA2101 = ITA - REGION 21 stratum 01 : [Region 21] Valle dAosta Licei
MEX9101 = MEX - REGION 91 stratum 01 : [NO Region 99 and above] Prv. Upp. Sec. Large Schools
ITA0201 = ITA - REGION 02 stratum 01 : [Region 02] Basilicata Licei
SVN0201 = SVN - stratum 01 : GIMg - gymnasia general
MYS0201 = MYS - stratum 01 : MOE Fully Residential School
ITA1201 = ITA - REGION 12 stratum 01 : [Region 12] Trento Licei
SVN1201 = SVN - stratum 01 : GIMg - gymnasia general
ITA0301 = ITA - REGION 03 stratum 01 : [Region 03] Campania Licei
SVN0301 = SVN - stratum 01 : GIMg - gymnasia general
ITA1301 = ITA - REGION 13 stratum 01 : [Region 13] Veneto (Other) Licei
ITA0401 = ITA - REGION 04 stratum 01 : [Region 04] Emilia Romagna Licei
SVN0401 = SVN - stratum 01 : GIMg - gymnasia general
ITA1401 = ITA - REGION 14 stratum 01 : [Region 14] Abruzzo Licei
ITA0501 = ITA - REGION 05 stratum 01 : [Region 05] Friuli Venezia Giulia Licei
SVN0501 = SVN - stratum 01 : GIMg - gymnasia general
ITA1501 = ITA - REGION 15 stratum 01 : [Region 15] Calabria Licei
ITA0601 = ITA - REGION 06 stratum 01 : [Region 06] Liguria Licei
SVN0601 = SVN - stratum 01 : GIMg - gymnasia general
ITA1601 = ITA - REGION 16 stratum 01 : [Region 16] Lazio Licei
ITA0701 = ITA - REGION 07 stratum 01 : [Region 07] Lombardia Licei
SVN0701 = SVN - stratum 01 : GIMg - gymnasia general
ITA1701 = ITA - REGION 17 stratum 01 : [Region 17] Marche Licei
ITA0801 = ITA - REGION 08 stratum 01 : [Region 08] Piemonte Licei
SVN0801 = SVN - stratum 01 : GIMg - gymnasia general
ITA1801 = ITA - REGION 18 stratum 01 : [Region 18] Molise Licei
ITA0901 = ITA - REGION 09 stratum 01 : [Region 09] Puglia Licei
SVN0901 = SVN - stratum 01 : GIMg - gymnasia general
ITA1901 = ITA - REGION 19 stratum 01 : [Region 19] Toscana Licei
CHE0011 = CHE - stratum 11 : 11-D-CH.other.v3.pub.
SWE0011 = SWE - stratum 11 : INDEP/ LOWER SEC/ SPARSE POP
TUR0011 = TUR - stratum 11 : TR4 GENERAL SECONDARY
PRT0011 = PRT - stratum 11 : Centro - Cova da Beira
AUT0011 = AUT - stratum 11 : TYPE 11 BMS wirtschaftlich
KAZ0011 = KAZ - stratum 11 : Almatinskaya oblast, russian and uighur
GBR2011 = QSC - stratum 11 : Scotland 11-independent/highest band
BEL0111 = BEL - stratum 11 : Flanders/Gen Ed and other type/network comm. Schls/ISCED3
TAP0111 = TAP - stratum 11 : Voc. Sr. HS. Prv. Rur.
GBR1111 = QUK - stratum 11 : England, Independent, South
MEX9111 = MEX - REGION 91 stratum 11 : [NO Region 99 and above] Oth. Prof. Tech. Pub.
THA0211 = THA - stratum 11 : Bureau of Local Educational Development and Co-ordination/Upper Secondary
CHL0211 = CHL - stratum 11 : Subsidized / Primary andSecondary / HS-TP
VNM0211 = VNM - stratum 11 : Central Viet Nam / Private / Rural
DEU0211 = DEU - stratum 11 : Rheinland-Pfalz (RP) /NOR
MEX0411 = MEX - REGION 04 stratum 11 : CAMPECHE, moderately small schools
ESP0611 = ESP - stratum 11 : Cantabria, public, NA
CHE0021 = CHE - stratum 21 : 21-F-CH.other.v1.pub.
ISL0021 = ISL - stratum 21 : Norðurland vestra / 1-8
PRT0021 = PRT - stratum 21 : Norte - Alto Trás-os-Montes
KAZ0021 = KAZ - stratum 21 : East-Kazakhstan oblast, both
BEL0121 = BEL - stratum 21 : Flanders/Part-time Vocational Ed/community
GBR1221 = QUK - stratum 21 : Northern Ireland, Maintained selective, North Eastern
CAN0321 = CAN - stratum 21 : prov 12 Eng. 18 to 34
MEX0721 = MEX - REGION 07 stratum 21 : CHIAPAS, very small schools
BRA0821 = BRA - stratum 21 : ESPÍRITO SANTO - FEDERAL/ESTADUAL
TUR0031 = TUR - stratum 31 : TRA GENERAL SECONDARY
KAZ0031 = KAZ - stratum 31 : West-Kazakhstan oblast, both
BRA1131 = BRA - stratum 31 : MATO GROSSO - MUNICIPAL
MEX1131 = MEX - REGION 11 stratum 31 : GUANAJUATO, large schools
CAN0431 = CAN - stratum 31 : prov 13 Eng. 35 to ...
ESP1631 = ESP - stratum 31 : BasqueCountry, public, A
KAZ0041 = KAZ - stratum 41 : Mangystauskaya oblast, kazakh only
MEX1441 = MEX - REGION 14 stratum 41 : JALISCO, moderately small schools
ARE0541 = ARE - stratum 41 : UMM AL QUWAIN,MOE,PUBLIC
CAN0541 = CAN - stratum 41 : prov 24 Eng. 18 to 34
KAZ0051 = KAZ - stratum 51 : South-Kazakhstan oblast, russian only
ARE0651 = ARE - stratum 51 : RAS AL KHAIMAH,MOE,PUBLIC
MEX1751 = MEX - REGION 17 stratum 51 : MORELOS, very small schools
BRA1851 = BRA - stratum 51 : PIAUÍ - FEDERAL/ESTADUAL
CZE1951 = CZE - stratum 51 : 6-8yrGym/Region5/Large
BRA2161 = BRA - stratum 61 : RIO GRANDE DO SUL - MUNICIPAL
MEX2161 = MEX - REGION 21 stratum 61 : PUEBLA, large schools
CZE2461 = CZE - stratum 61 : 6-8yrGym/Region10/Large
CAN0761 = CAN - stratum 61 : prov 46 Eng. 18 to 34
BRA2471 = BRA - stratum 71 : SANTA CATARINA - PRIVADA
MEX2471 = MEX - REGION 24 stratum 71 : SAN LUIS POTOSI, moderately small schools
CAN0871 = CAN - stratum 71 : prov 47 Eng. 18 to 34
CZE3281 = CZE - stratum 81 : Special/practical/MSS
MEX2781 = MEX - REGION 27 stratum 81 : TABASCO, very small schools
CAN0981 = CAN - stratum 81 : prov 48 Eng. 18 to 34
CAN1091 = CAN - stratum 91 : prov 59 Eng. 18 to 34
MEX3191 = MEX - REGION 31 stratum 91 : YUCATAN, large schools
ALB0002 = ALB - stratum 02 : North, Urban, Private
MAC0002 = MAC - stratum 02 : Stratum 2: Public, Technical-vocational, Chinese
GRC0002 = GRC - stratum 02 : Central Greece public
SWE0002 = SWE - stratum 02 : PUB/ LOWER SEC/ OTHER LARGE
CRI0002 = CRI - stratum 02 : Public/ academic/ rural
POL0002 = POL - stratum 02 : 2 – Private Gymnasium
IRL0002 = IRL - stratum 02 : Size 41-80 / Community/Comprehensive
QCN0002 = QCN - stratum 02 : Mixed ISCED/General/no selectivity
FIN0002 = FIN - stratum 02 : South-Urban-Low/Not 0
NOR0002 = NOR - stratum 02 : Upper secondary schools
TUR0002 = TUR - stratum 02 : TR1 GENERAL SECONDARY
QAT0002 = QAT - stratum 02 : 2 – Independent complex
PRT0002 = PRT - stratum 02 : Alentejo - Alentejo Litoral
AUT0002 = AUT - stratum 02 : TYPE 2 Polytechnische Schulen
HRV0002 = HRV - stratum 02 : Vocational - industrial - crafts prog.
LUX0002 = LUX - stratum 02 : EST government-public
URY0002 = URY - stratum 02 : Public General Secondary Schools and Military School,Mixed
KAZ0002 = KAZ - stratum 02 : Akmolinskaya oblast, russian only
ITA1002 = ITA - REGION 10 stratum 02 : [Region 10] Sardegna Tecnici
SVN1002 = SVN - stratum 02 : GIMs - gymnasia specialist
ITA2002 = ITA - REGION 20 stratum 02 : [Region 20] Umbria Tecnici
GBR2002 = QSC - stratum 02 : Scotland 2-public/second lowest band
THA0102 = THA - stratum 02 : Office of the Basic Education Commission/Mixed
ITA0102 = ITA - REGION 01 stratum 02 : [Region 01] Bolzano Tecnici
ARE0102 = ARE - stratum 02 : ABU DHABI,MOE,PRIVATE
BEL0102 = BEL - stratum 02 : Flanders/Gen Ed only/private subsidized/ISCED3
CHL0102 = CHL - stratum 02 : Municipal / Primary andSecondary / HS
NZL0102 = NZL - stratum 02 : Stratum 2:Medium large schools (> 29 and < 250)
VNM0102 = VNM - stratum 02 : North Viet Nam / Public / Rural
CAN0102 = CAN - stratum 02 : prov 10 Fr.& Eng. 18 to 34
SVN0102 = SVN - stratum 02 : GIMs - gymnasia specialist
TAP0102 = TAP - stratum 02 : Gen. Jr. HS. Pub. Urb.
ESP0102 = ESP - stratum 02 : Andalusia, private, NA
MYS0102 = MYS - stratum 02 : MOE National Secondary School
MEX0102 = MEX - REGION 01 stratum 02 : AGUASCALIENTES, moderately small schools
ITA1102 = ITA - REGION 11 stratum 02 : [Region 11] Sicilia Tecnici
SVN1102 = SVN - stratum 02 : GIMs - gymnasia specialist
GBR1102 = QUK - stratum 02 : England, Maintained selective, Midlands
ITA2102 = ITA - REGION 21 stratum 02 : [Region 21] Valle dAosta Tecnici
MEX9102 = MEX - REGION 91 stratum 02 : [NO Region 99 and above] Prv. Upp. Sec. MSS
ITA0202 = ITA - REGION 02 stratum 02 : [Region 02] Basilicata Tecnici
NZL0202 = NZL - stratum 02 : Stratum 2:Medium large schools (> 29 and < 250)
JPN0202 = JPN - stratum 02 : 02: Public and Practical
SVN0202 = SVN - stratum 02 : GIMs - gymnasia specialist
KOR0202 = KOR - stratum 02 : Stratum 2: Upper secondary/General
MYS0202 = MYS - stratum 02 : MOE National Secondary School
ITA1202 = ITA - REGION 12 stratum 02 : [Region 12] Trento Tecnici
ITA0302 = ITA - REGION 03 stratum 02 : [Region 03] Campania Tecnici
SVN0302 = SVN - stratum 02 : GIMs - gymnasia specialist
KOR0302 = KOR - stratum 02 : Stratum 2: Upper secondary/General
ITA1302 = ITA - REGION 13 stratum 02 : [Region 13] Veneto (Other) Tecnici
ITA0402 = ITA - REGION 04 stratum 02 : [Region 04] Emilia Romagna Tecnici
ITA1402 = ITA - REGION 14 stratum 02 : [Region 14] Abruzzo Tecnici
ITA0502 = ITA - REGION 05 stratum 02 : [Region 05] Friuli Venezia Giulia Tecnici
ITA1502 = ITA - REGION 15 stratum 02 : [Region 15] Calabria Tecnici
ITA0602 = ITA - REGION 06 stratum 02 : [Region 06] Liguria Tecnici
SVN0602 = SVN - stratum 02 : GIMs - gymnasia specialist
ITA1602 = ITA - REGION 16 stratum 02 : [Region 16] Lazio Tecnici
ITA0702 = ITA - REGION 07 stratum 02 : [Region 07] Lombardia Tecnici
SVN0702 = SVN - stratum 02 : GIMs - gymnasia specialist
ITA1702 = ITA - REGION 17 stratum 02 : [Region 17] Marche Tecnici
ITA0802 = ITA - REGION 08 stratum 02 : [Region 08] Piemonte Tecnici
SVN0802 = SVN - stratum 02 : GIMs - gymnasia specialist
ITA1802 = ITA - REGION 18 stratum 02 : [Region 18] Molise Tecnici
ITA0902 = ITA - REGION 09 stratum 02 : [Region 09] Puglia Tecnici
SVN0902 = SVN - stratum 02 : GIMs - gymnasia specialist
ITA1902 = ITA - REGION 19 stratum 02 : [Region 19] Toscana Tecnici
ALB0012 = ALB - stratum 12 : South, Rural, Private
TUR0012 = TUR - stratum 12 : TR4 VOCATIONAL AND TECHNICAL SECONDARY
AUT0012 = AUT - stratum 12 : TYPE 12 BMS landwirtschaftlich
KAZ0012 = KAZ - stratum 12 : Almatinskaya oblast, russian and kazakh and uighur
GBR2012 = QSC - stratum 12 : Scotland 12-independent/missing
BEL0112 = BEL - stratum 12 : Flanders/Gen Ed and other type/network comm. Schls/Mixed ISCED
TAP0112 = TAP - stratum 12 : Voc. Sr. HS. Prv. Urb.
GBR1112 = QUK - stratum 12 : England, Independent, Greater London
THA0212 = THA - stratum 12 : Commission of Higher Education/Lower secondary
CHL0212 = CHL - stratum 12 : Subsidized / Secondary / HS
MEX0412 = MEX - REGION 04 stratum 12 : CAMPECHE, very small schools
ESP0612 = ESP - stratum 12 : Cantabria, private, NA
CHE0022 = CHE - stratum 22 : 22-F-CH.other.v2.pub.
ISL0022 = ISL - stratum 22 : Norðurland vestra / 9-16
TUR0022 = TUR - stratum 22 : TR7 GENERAL SECONDARY
KAZ0022 = KAZ - stratum 22 : Almaty city, kazakh only
BEL0222 = BEL - stratum 22 : French com/Regular/ISCED2
GBR1222 = QUK - stratum 22 : Northern Ireland, Maintained selective, South Eastern
CAN0322 = CAN - stratum 22 : prov 12 Eng. 35 to ...
BRA0822 = BRA - stratum 22 : ESPÍRITO SANTO - MUNICIPAL
MEX0822 = MEX - REGION 08 stratum 22 : CHIHUAHUA, large schools
TUR0032 = TUR - stratum 32 : TRA VOCATIONAL AND TECHNICAL SECONDARY
KAZ0032 = KAZ - stratum 32 : Karagandinskaya oblast, kazakh only
BRA1132 = BRA - stratum 32 : MATO GROSSO - PRIVADA
MEX1132 = MEX - REGION 11 stratum 32 : GUANAJUATO, moderately small schools
ESP1632 = ESP - stratum 32 : BasqueCountry, public, B
KAZ0042 = KAZ - stratum 42 : Mangystauskaya oblast, russian only
MEX1442 = MEX - REGION 14 stratum 42 : JALISCO, very small schools
ARE0542 = ARE - stratum 42 : UMM AL QUWAIN,MOE,PRIVATE
CAN0542 = CAN - stratum 42 : prov 24 Eng. 35 to 305
BRA1542 = BRA - stratum 42 : PARAÍBA - FEDERAL/ESTADUAL
RUS0052 = RUS - stratum 52 : Nizhni Novgorod region
KAZ0052 = KAZ - stratum 52 : South-Kazakhstan oblast, both
ARE0652 = ARE - stratum 52 : RAS AL KHAIMAH,MOE,PRIVATE
CAN0652 = CAN - stratum 52 : prov 35 Eng. 35 to ...
MEX1852 = MEX - REGION 18 stratum 52 : NAYARIT, large schools
CZE1952 = CZE - stratum 52 : 6-8yrGym/Region5/MSS andVSS
BRA2162 = BRA - stratum 62 : RIO GRANDE DO SUL - PRIVADA
MEX2162 = MEX - REGION 21 stratum 62 : PUEBLA, moderately small schools
CZE2462 = CZE - stratum 62 : 6-8yrGym/Region10/MSS andVSS
CAN0762 = CAN - stratum 62 : prov 46 Eng. 35 to ...
MEX2472 = MEX - REGION 24 stratum 72 : SAN LUIS POTOSI, very small schools
BRA2572 = BRA - stratum 72 : SÃO PAULO - FEDERAL/ESTADUAL
CAN0872 = CAN - stratum 72 : prov 47 Eng. 35 to ...
CZE3282 = CZE - stratum 82 : Special/practical/VSS
MEX2882 = MEX - REGION 28 stratum 82 : TAMAULIPAS, large schools
CAN0982 = CAN - stratum 82 : prov 48 Eng. 35 to ...
CAN1092 = CAN - stratum 92 : prov 59 Eng. 35 to ...
MEX3192 = MEX - REGION 31 stratum 92 : YUCATAN, moderately small schools
MAC0003 = MAC - stratum 03 : Stratum 3: Private-in-Net, Grammar-International, Chinese
GRC0003 = GRC - stratum 03 : Central Macedonia public
SWE0003 = SWE - stratum 03 : PUB/ LOWER SEC/ AT LEAST 12500
HKG0003 = HKG - stratum 03 : Private or International
CRI0003 = CRI - stratum 03 : Public/ technical/ urban
IRL0003 = IRL - stratum 03 : Size > 80 / Community/Comprehensive
TUR0003 = TUR - stratum 03 : TR1 VOCATIONAL AND TECHNICAL SECONDARY
RUS0003 = RUS - stratum 03 : Republic of Bashkortostan
PRT0003 = PRT - stratum 03 : Alentejo - Alto Alentejo
LUX0003 = LUX - stratum 03 : ES+EST government-public
URY0003 = URY - stratum 03 : Public General Secondary Schools and Military School,Upper secondary only
KAZ0003 = KAZ - stratum 03 : Akmolinskaya oblast, both
ITA1003 = ITA - REGION 10 stratum 03 : [Region 10] Sardegna Professionali
SVN1003 = SVN - stratum 03 : STSI - technical educational programmes
ITA2003 = ITA - REGION 20 stratum 03 : [Region 20] Umbria Professionali
GBR2003 = QSC - stratum 03 : Scotland 3-public/middle band
THA0103 = THA - stratum 03 : Office of the Basic Education Commission/Upper secondary
ITA0103 = ITA - REGION 01 stratum 03 : [Region 01] Bolzano Professionali
BEL0103 = BEL - stratum 03 : Flanders/Gen Ed only/private subsidized/Mixed ISCED
CHL0103 = CHL - stratum 03 : Municipal / Primary andSecondary / TP
VNM0103 = VNM - stratum 03 : North Viet Nam / Public / Remote area
CAN0103 = CAN - stratum 03 : prov 10 Fr.& Eng. 35 to 196
SVN0103 = SVN - stratum 03 : STSI - technical educational programmes
TAP0103 = TAP - stratum 03 : Gen. Jr. HS. Prv. Rur.
MEX0103 = MEX - REGION 01 stratum 03 : AGUASCALIENTES, very small schools
ITA1103 = ITA - REGION 11 stratum 03 : [Region 11] Sicilia Professionali
SVN1103 = SVN - stratum 03 : STSI - technical educational programmes
GBR1103 = QUK - stratum 03 : England, Maintained selective, South
ITA2103 = ITA - REGION 21 stratum 03 : [Region 21] Valle dAosta Professionali
MEX9103 = MEX - REGION 91 stratum 03 : [NO Region 99 and above] Prv. Upp. Sec. VSS
ITA0203 = ITA - REGION 02 stratum 03 : [Region 02] Basilicata Professionali
NZL0203 = NZL - stratum 03 : Stratum 3:Small schools (<30)
JPN0203 = JPN - stratum 03 : 03: Private and Academic
SVN0203 = SVN - stratum 03 : STSI - technical educational programmes
ITA1203 = ITA - REGION 12 stratum 03 : [Region 12] Trento Professionali
SVN1203 = SVN - stratum 03 : STSI - technical educational programmes
ITA0303 = ITA - REGION 03 stratum 03 : [Region 03] Campania Professionali
COL0303 = COL - stratum 03 : MANIZALES-ESCUELA ACTIVA
SVN0303 = SVN - stratum 03 : STSI - technical educational programmes
ITA1303 = ITA - REGION 13 stratum 03 : [Region 13] Veneto (Other) Professionali
ITA0403 = ITA - REGION 04 stratum 03 : [Region 04] Emilia Romagna Professionali
SVN0403 = SVN - stratum 03 : STSI - technical educational programmes
KOR0403 = KOR - stratum 03 : Stratum 3: Upper secondary/Vocational
ITA1403 = ITA - REGION 14 stratum 03 : [Region 14] Abruzzo Professionali
ITA0503 = ITA - REGION 05 stratum 03 : [Region 05] Friuli Venezia Giulia Professionali
SVN0503 = SVN - stratum 03 : STSI - technical educational programmes
ITA1503 = ITA - REGION 15 stratum 03 : [Region 15] Calabria Professionali
ITA0603 = ITA - REGION 06 stratum 03 : [Region 06] Liguria Professionali
SVN0603 = SVN - stratum 03 : STSI - technical educational programmes
ITA1603 = ITA - REGION 16 stratum 03 : [Region 16] Lazio Professionali
ITA0703 = ITA - REGION 07 stratum 03 : [Region 07] Lombardia Professionali
SVN0703 = SVN - stratum 03 : STSI - technical educational programmes
ITA1703 = ITA - REGION 17 stratum 03 : [Region 17] Marche Professionali
ITA0803 = ITA - REGION 08 stratum 03 : [Region 08] Piemonte Professionali
SVN0803 = SVN - stratum 03 : STSI - technical educational programmes
ITA1803 = ITA - REGION 18 stratum 03 : [Region 18] Molise Professionali
ITA0903 = ITA - REGION 09 stratum 03 : [Region 09] Puglia Professionali
SVN0903 = SVN - stratum 03 : STSI - technical educational programmes
ITA1903 = ITA - REGION 19 stratum 03 : [Region 19] Toscana Professionali
AUT0013 = AUT - stratum 13 : TYPE 13 BHS gewerblich
KAZ0013 = KAZ - stratum 13 : Astana city, kazakh only
BEL0113 = BEL - stratum 13 : Flanders/Tech or Voc/private subsidized/ISCED2
THA0213 = THA - stratum 13 : Commission of Higher Education/Mixed
CHL0213 = CHL - stratum 13 : Subsidized / Secondary / TP
TAP0213 = TAP - stratum 13 : Mix. Sr. HS. Pub. Rur.
VNM0313 = VNM - stratum 13 : Southern Viet Nam / Public / Urban
GBR1313 = QUK - stratum 13 : Wales, Maintained, North
BRA0513 = BRA - stratum 13 : BAHIA - FEDERAL/ESTADUAL
MEX0513 = MEX - REGION 05 stratum 13 : COAHUILA, large schools
ESP0713 = ESP - stratum 13 : CastileandLeon, public, NA
CHE0023 = CHE - stratum 23 : 23-F-CH.other.v3.pub.
ISL0023 = ISL - stratum 23 : Norðurland vestra /17-35
TUR0023 = TUR - stratum 23 : TR7 VOCATIONAL AND TECHNICAL SECONDARY
KAZ0023 = KAZ - stratum 23 : Almaty city, russian only
BEL0223 = BEL - stratum 23 : French com/Regular/ Mixed ISCED/Academic only
GBR1223 = QUK - stratum 23 : Northern Ireland, Maintained selective, Southern
BRA0823 = BRA - stratum 23 : ESPÍRITO SANTO - PRIVADA
MEX0823 = MEX - REGION 08 stratum 23 : CHIHUAHUA, moderately small schools
KAZ0033 = KAZ - stratum 33 : Karagandinskaya oblast, russian only
MEX1133 = MEX - REGION 11 stratum 33 : GUANAJUATO, very small schools
BRA1233 = BRA - stratum 33 : MATO GROSSO DO SUL - FEDERAL/ESTADUAL
ESP1633 = ESP - stratum 33 : BasqueCountry, public, D
KAZ0043 = KAZ - stratum 43 : Mangystauskaya oblast, both
CAN0543 = CAN - stratum 43 : prov 24 Eng. 306 to ...
CZE1543 = CZE - stratum 43 : 6-8yrGym/Region1/Large
MEX1543 = MEX - REGION 15 stratum 43 : MEXICO, large schools
KAZ0053 = KAZ - stratum 53 : South-Kazakhstan oblast, kazakh and other
CZE2053 = CZE - stratum 53 : 6-8yrGym/Region6/Large
MEX1853 = MEX - REGION 18 stratum 53 : NAYARIT, moderately small schools
MEX2163 = MEX - REGION 21 stratum 63 : PUEBLA, very small schools
BRA2263 = BRA - stratum 63 : RONDÔNIA - FEDERAL/ESTADUAL
CZE2563 = CZE - stratum 63 : 6-8yrGym/Region11/Large
BRA2573 = BRA - stratum 73 : SÃO PAULO - MUNICIPAL
MEX2573 = MEX - REGION 25 stratum 73 : SINALOA, large schools
MEX2883 = MEX - REGION 28 stratum 83 : TAMAULIPAS, moderately small schools
MEX3193 = MEX - REGION 31 stratum 93 : YUCATAN, very small schools
ALB0004 = ALB - stratum 04 : North, Rural, Private
MAC0004 = MAC - stratum 04 : Stratum 4: Private-in-Net, Grammar-International, English
SWE0004 = SWE - stratum 04 : PUB/ LOWER SEC/ MANUFACTURING
HKG0004 = HKG - stratum 04 : Direct Subsidy Scheme
CRI0004 = CRI - stratum 04 : Public/ technical/ rural
IRL0004 = IRL - stratum 04 : Size <=40 / Secondary
QCN0004 = QCN - stratum 04 : ISCED3/General/ordinary
PRT0004 = PRT - stratum 04 : Alentejo - Baixo Alentejo
HRV0004 = HRV - stratum 04 : Art - vocational prog.
LUX0004 = LUX - stratum 04 : EST government-private
URY0004 = URY - stratum 04 : Private General Secondary Schools,Lower secondary only
KAZ0004 = KAZ - stratum 04 : Aktubinskaya oblast, kazakh only
ITA1004 = ITA - REGION 10 stratum 04 : [Region 10] Sardegna Medie
SVN1004 = SVN - stratum 04 : SPI - vocational of medium duration
ITA2004 = ITA - REGION 20 stratum 04 : [Region 20] Umbria Medie
GBR2004 = QSC - stratum 04 : Scotland 4-public/second highest band
ITA0104 = ITA - REGION 01 stratum 04 : [Region 01] Bolzano Medie
BEL0104 = BEL - stratum 04 : Flanders/Gen Ed only/network comm. Schls/ISCED2
CHL0104 = CHL - stratum 04 : Municipal / Primary andSecondary / HS-TP
VNM0104 = VNM - stratum 04 : North Viet Nam / Private / Urban
CAN0104 = CAN - stratum 04 : prov 10 Fr.& Eng. 197 to ...
SVN0104 = SVN - stratum 04 : SPI - vocational of medium duration
TAP0104 = TAP - stratum 04 : Gen. Jr. HS. Prv. Urb.
DEU0104 = DEU - stratum 04 : Brandenburg (BB) /NOR
ITA1104 = ITA - REGION 11 stratum 04 : [Region 11] Sicilia Medie
SVN1104 = SVN - stratum 04 : SPI - vocational of medium duration
GBR1104 = QUK - stratum 04 : England, Maintained selective, Greater London
ITA2104 = ITA - REGION 21 stratum 04 : [Region 21] Valle dAosta Medie
MEX9104 = MEX - REGION 91 stratum 04 : [NO Region 99 and above] Aut. Gen. Upp. Sec. Pub.
THA0204 = THA - stratum 04 : Office of the Private Education Commission/Lower Secondary
BRA0204 = BRA - stratum 04 : ALAGOAS - FEDERAL/ESTADUAL
ITA0204 = ITA - REGION 02 stratum 04 : [Region 02] Basilicata Medie
JPN0204 = JPN - stratum 04 : 04: Private and Practical
SVN0204 = SVN - stratum 04 : SPI - vocational of medium duration
MEX0204 = MEX - REGION 02 stratum 04 : BAJA CALIFORNIA, large schools
ITA1204 = ITA - REGION 12 stratum 04 : [Region 12] Trento Medie
SVN1204 = SVN - stratum 04 : SPI - vocational of medium duration
ITA0304 = ITA - REGION 03 stratum 04 : [Region 03] Campania Medie
SVN0304 = SVN - stratum 04 : SPI - vocational of medium duration
ITA1304 = ITA - REGION 13 stratum 04 : [Region 13] Veneto (Other) Medie
ITA0404 = ITA - REGION 04 stratum 04 : [Region 04] Emilia Romagna Medie
SVN0404 = SVN - stratum 04 : SPI - vocational of medium duration
ITA1404 = ITA - REGION 14 stratum 04 : [Region 14] Abruzzo Medie
ITA0504 = ITA - REGION 05 stratum 04 : [Region 05] Friuli Venezia Giulia Medie
SVN0504 = SVN - stratum 04 : SPI - vocational of medium duration
ITA1504 = ITA - REGION 15 stratum 04 : [Region 15] Calabria Medie
ITA0604 = ITA - REGION 06 stratum 04 : [Region 06] Liguria Medie
SVN0604 = SVN - stratum 04 : SPI - vocational of medium duration
ITA1604 = ITA - REGION 16 stratum 04 : [Region 16] Lazio Medie
ITA0704 = ITA - REGION 07 stratum 04 : [Region 07] Lombardia Medie
SVN0704 = SVN - stratum 04 : SPI - vocational of medium duration
ITA1704 = ITA - REGION 17 stratum 04 : [Region 17] Marche Medie
ITA0804 = ITA - REGION 08 stratum 04 : [Region 08] Piemonte Medie
SVN0804 = SVN - stratum 04 : SPI - vocational of medium duration
ITA1804 = ITA - REGION 18 stratum 04 : [Region 18] Molise Medie
ITA0904 = ITA - REGION 09 stratum 04 : [Region 09] Puglia Medie
SVN0904 = SVN - stratum 04 : SPI - vocational of medium duration
ITA1904 = ITA - REGION 19 stratum 04 : [Region 19] Toscana Medie
GRC0014 = GRC - stratum 14 : West Macedonia public
FIN0014 = FIN - stratum 14 : Swedish/Aland-Urban-Low
TUN0014 = TUN - stratum 14 : Center-east/Periphery
AUT0014 = AUT - stratum 14 : TYPE 14 BHS kaufmännisch
BEL0114 = BEL - stratum 14 : Flanders/Tech or Voc/private subsidized/ISCED3
THA0214 = THA - stratum 14 : Vocational Education Commission/Upper Secondary
CHL0214 = CHL - stratum 14 : Subsidized / Secondary / HS-TP
TAP0214 = TAP - stratum 14 : Mix. Sr. HS. Pub. Urb.
DEU0214 = DEU - stratum 14 : Sachsen-Anhalt (ST) /NOR
VNM0314 = VNM - stratum 14 : Southern Viet Nam / Public / Rural
GBR1314 = QUK - stratum 14 : Wales, Maintained, Powys and South West
MEX0514 = MEX - REGION 05 stratum 14 : COAHUILA, moderately small schools
ESP0714 = ESP - stratum 14 : CastileandLeon, private, NA
ISL0024 = ISL - stratum 24 : Norðurland vestra / >35
RUS0024 = RUS - stratum 24 : Krasnoyarsk territory
BEL0224 = BEL - stratum 24 : French com/Regular/ Mixed ISCED/Mixed
GBR1224 = QUK - stratum 24 : Northern Ireland, Maintained non-selective, Belfast
MEX0824 = MEX - REGION 08 stratum 24 : CHIHUAHUA, very small schools
BRA0924 = BRA - stratum 24 : GOIÁS - FEDERAL/ESTADUAL
TUR0034 = TUR - stratum 34 : TRB GENERAL SECONDARY
KAZ0034 = KAZ - stratum 34 : Karagandinskaya oblast, both
BRA1234 = BRA - stratum 34 : MATO GROSSO DO SUL - MUNICIPAL
MEX1234 = MEX - REGION 12 stratum 34 : GUERRERO, large schools
ESP1634 = ESP - stratum 34 : BasqueCountry, private, A
KAZ0044 = KAZ - stratum 44 : Pavlodarskaya oblast, kazakh only
CZE1544 = CZE - stratum 44 : 6-8yrGym/Region1/MSS andVSS
MEX1544 = MEX - REGION 15 stratum 44 : MEXICO, moderately small schools
KAZ0054 = KAZ - stratum 54 : South-Kazakhstan oblast, kazakh and uzbek
CZE2054 = CZE - stratum 54 : 6-8yrGym/Region6/MSS andVSS
ARE0654 = ARE - stratum 54 : RAS AL KHAIMAH,US,PRIVATE
MEX1854 = MEX - REGION 18 stratum 54 : NAYARIT, very small schools
BRA1954 = BRA - stratum 54 : RIO DE JANEIRO - FEDERAL/ESTADUAL
MEX2264 = MEX - REGION 22 stratum 64 : QUERETARO, large schools
CZE2564 = CZE - stratum 64 : 6-8yrGym/Region11/MSS andVSS
CZE3074 = CZE - stratum 74 : Voc-Conservatory with maturate/Large
MEX2574 = MEX - REGION 25 stratum 74 : SINALOA, moderately small schools
MEX2884 = MEX - REGION 28 stratum 84 : TAMAULIPAS, very small schools
MEX3294 = MEX - REGION 32 stratum 94 : ZACATECAS, large schools
ALB0005 = ALB - stratum 05 : Center, Urban, Public
MAC0005 = MAC - stratum 05 : Stratum 5: Private-in-Net, Grammar-International, Chinese and English
GRC0005 = GRC - stratum 05 : East Macedonia public
SWE0005 = SWE - stratum 05 : PUB/ LOWER SEC/ SPARSE POP
IRL0005 = IRL - stratum 05 : Size 41-80 / Secondary
ISL0005 = ISL - stratum 05 : Nágrenni Reykjavíkur / 1-8
QCN0005 = QCN - stratum 05 : Vocational/no selectivity
TUR0005 = TUR - stratum 05 : TR2 GENERAL SECONDARY
PRT0005 = PRT - stratum 05 : Alentejo - Lezíria do Tejo
AUT0005 = AUT - stratum 05 : TYPE 5 Schulen mit Statut - Waldorfschulen
LUX0005 = LUX - stratum 05 : ES+EST government-private
URY0005 = URY - stratum 05 : Private General Secondary Schools,Mixed
KAZ0005 = KAZ - stratum 05 : Aktubinskaya oblast, russian only
SVN1005 = SVN - stratum 05 : NPI - vocational of short duration
ITA2005 = ITA - REGION 20 stratum 05 : [Region 20] Umbria Formazione Professionale
GBR2005 = QSC - stratum 05 : Scotland 5-public/highest band
ITA0105 = ITA - REGION 01 stratum 05 : [Region 01] Bolzano Formazione Professionale
BEL0105 = BEL - stratum 05 : Flanders/Gen Ed only/network comm. Schls/ISCED3
CHL0105 = CHL - stratum 05 : Municipal / Secondary / HS
VNM0105 = VNM - stratum 05 : North Viet Nam / Private / Rural
SVN0105 = SVN - stratum 05 : NPI - vocational of short duration
TAP0105 = TAP - stratum 05 : Gen. Sr. HS. Pub. Rur.
SVN1105 = SVN - stratum 05 : NPI - vocational of short duration
GBR1105 = QUK - stratum 05 : England, Maintained non-selective, North
MEX9105 = MEX - REGION 91 stratum 05 : [NO Region 99 and above] Cen. St. Gen. Upp. Sec. Pub.
THA0205 = THA - stratum 05 : Office of the Private Education Commission/Mixed
SVN0205 = SVN - stratum 05 : NPI - vocational of short duration
MYS0205 = MYS - stratum 05 : non-MOE MARA Junior Science College
MEX0205 = MEX - REGION 02 stratum 05 : BAJA CALIFORNIA, moderately small schools
ITA1205 = ITA - REGION 12 stratum 05 : [Region 12] Trento Formazione Professionale
SVN1205 = SVN - stratum 05 : NPI - vocational of short duration
SVN0305 = SVN - stratum 05 : NPI - vocational of short duration
ITA1305 = ITA - REGION 13 stratum 05 : [Region 13] Veneto (Other) Formazione Professionale
ITA0405 = ITA - REGION 04 stratum 05 : [Region 04] Emilia Romagna Formazione Professionale
SVN0405 = SVN - stratum 05 : NPI - vocational of short duration
ITA1405 = ITA - REGION 14 stratum 05 : [Region 14] Abruzzo Formazione Professionale
ITA0505 = ITA - REGION 05 stratum 05 : [Region 05] Friuli Venezia Giulia Formazione Professionale
SVN0505 = SVN - stratum 05 : NPI - vocational of short duration
ITA1505 = ITA - REGION 15 stratum 05 : [Region 15] Calabria Formazione Professionale
ITA0605 = ITA - REGION 06 stratum 05 : [Region 06] Liguria Formazione Professionale
SVN0605 = SVN - stratum 05 : NPI - vocational of short duration
ITA0705 = ITA - REGION 07 stratum 05 : [Region 07] Lombardia Formazione Professionale
SVN0705 = SVN - stratum 05 : NPI - vocational of short duration
ITA1705 = ITA - REGION 17 stratum 05 : [Region 17] Marche Formazione Professionale
ITA0805 = ITA - REGION 08 stratum 05 : [Region 08] Piemonte Formazione Professionale
SVN0805 = SVN - stratum 05 : NPI - vocational of short duration
ITA0905 = ITA - REGION 09 stratum 05 : [Region 09] Puglia Formazione Professionale
SVN0905 = SVN - stratum 05 : NPI - vocational of short duration
ITA1905 = ITA - REGION 19 stratum 05 : [Region 19] Toscana Formazione Professionale
FIN0015 = FIN - stratum 15 : Swedish/Aland-Rural-Low
TUR0015 = TUR - stratum 15 : TR5 GENERAL SECONDARY
PRT0015 = PRT - stratum 15 : Centro - Pinhal Interior Norte
AUT0015 = AUT - stratum 15 : TYPE 15 BHS wirtschaftlich
BEL0115 = BEL - stratum 15 : Flanders/Tech or Voc/private subsidized/Mixed ISCED
THA0215 = THA - stratum 15 : Special schools with Math/Science focus/Mixed
TAP0215 = TAP - stratum 15 : Mix. Sr. HS. Prv. Rur.
DEU0215 = DEU - stratum 15 : Schleswig-Holstein (SH) / NOR
CHL0315 = CHL - stratum 15 : Private / Primary / Only Primary
VNM0315 = VNM - stratum 15 : Southern Viet Nam / Public / Remote area
GBR1315 = QUK - stratum 15 : Wales, Maintained, South East
MEX0515 = MEX - REGION 05 stratum 15 : COAHUILA, very small schools
ESP0815 = ESP - stratum 15 : Castile-LaMancha,public,NA
ISL0025 = ISL - stratum 25 : Norðurland eystra / 1-8
TUR0025 = TUR - stratum 25 : TR8 GENERAL SECONDARY
PRT0025 = PRT - stratum 25 : Norte - Entre Douro e Vouga
KAZ0025 = KAZ - stratum 25 : Almaty city, russian and uighur w/wo kazakh
BEL0225 = BEL - stratum 25 : French com/Regular/ Mixed ISCED/Vocational only
GBR1225 = QUK - stratum 25 : Northern Ireland, Maintained non-selective, Western
MEX0925 = MEX - REGION 09 stratum 25 : DISTRITO FEDERAL, large schools
TUR0035 = TUR - stratum 35 : TRB VOCATIONAL AND TECHNICAL SECONDARY
KAZ0035 = KAZ - stratum 35 : Kostanayskaya oblast, kazakh only
BRA1235 = BRA - stratum 35 : MATO GROSSO DO SUL - PRIVADA
MEX1235 = MEX - REGION 12 stratum 35 : GUERRERO, moderately small schools
ESP1635 = ESP - stratum 35 : BasqueCountry, private, B
KAZ0045 = KAZ - stratum 45 : Pavlodarskaya oblast, russian only
MEX1545 = MEX - REGION 15 stratum 45 : MEXICO, very small schools
BRA1645 = BRA - stratum 45 : PARANÁ - FEDERAL/ESTADUAL
CZE1645 = CZE - stratum 45 : 6-8yrGym/Region2/Large
KAZ0055 = KAZ - stratum 55 : South-Kazakhstan oblast, kazakh and uzbek and other
CZE2155 = CZE - stratum 55 : 6-8yrGym/Region7/Large
BRA1955 = BRA - stratum 55 : RIO DE JANEIRO - MUNICIPAL
MEX1955 = MEX - REGION 19 stratum 55 : NUEVO LEON, large schools
MEX2265 = MEX - REGION 22 stratum 65 : QUERETARO, moderately small schools
CZE2665 = CZE - stratum 65 : 6-8yrGym/Region12/Large
CZE3075 = CZE - stratum 75 : Voc-Conservatory with maturate/MSS
MEX2575 = MEX - REGION 25 stratum 75 : SINALOA, very small schools
BRA2675 = BRA - stratum 75 : SERGIPE - FEDERAL/ESTADUAL
MEX2985 = MEX - REGION 29 stratum 85 : TLAXCALA, large schools
MEX3295 = MEX - REGION 32 stratum 95 : ZACATECAS, moderately small schools
ALB0006 = ALB - stratum 06 : Center, Urban, Private
MAC0006 = MAC - stratum 06 : Stratum 6: Private-in-Net, Technical-vocational, Chinese
IRL0006 = IRL - stratum 06 : Size > 80 / Secondary
ISL0006 = ISL - stratum 06 : Nágrenni Reykjavíkur / 9-16
SVN0006 = SVN - stratum 00 : OS - elementary school
TUR0006 = TUR - stratum 06 : TR2 VOCATIONAL AND TECHNICAL SECONDARY
AUT0006 = AUT - stratum 06 : TYPE 6 Schulen mit Statut - Sonstige
HRV0006 = HRV - stratum 06 : Primary schools (lower secondary education)
LUX0006 = LUX - stratum 06 : Government independent
URY0006 = URY - stratum 06 : Private General Secondary Schools,Upper secondary only
KAZ0006 = KAZ - stratum 06 : Aktubinskaya oblast, both
GBR2006 = QSC - stratum 06 : Scotland 6-public/missing
BEL0106 = BEL - stratum 06 : Flanders/Gen Ed only/network comm. Schls/Mixed ISCED
CHL0106 = CHL - stratum 06 : Municipal / Secondary / TP
VNM0106 = VNM - stratum 06 : North Viet Nam / Private / Remote area
TAP0106 = TAP - stratum 06 : Gen. Sr. HS. Pub. Urb.
MYS0106 = MYS - stratum 06 : non-MOE Other Schools
GBR1106 = QUK - stratum 06 : England, Maintained non-selective, Midlands
MEX9106 = MEX - REGION 91 stratum 06 : [NO Region 99 and above] Dec. St. Gen. Upp. Sec. Pub.
THA0206 = THA - stratum 06 : Office of the Private Education Commission/Upper Secondary
MYS0206 = MYS - stratum 06 : non-MOE Other Schools
MEX0206 = MEX - REGION 02 stratum 06 : BAJA CALIFORNIA, very small schools
ESP0306 = ESP - stratum 06 : Asturias, private, NA
ITA1306 = ITA - REGION 13 stratum 06 : [Region 13] Veneto (Rovigo) Licei
GRC0016 = GRC - stratum 16 : Rest of Greece private
FIN0016 = FIN - stratum 16 : Swedish/Not Aland-Urban-Low
TUR0016 = TUR - stratum 16 : TR5 VOCATIONAL AND TECHNICAL SECONDARY
RUS0016 = RUS - stratum 16 : Republic of Tatarstan
PRT0016 = PRT - stratum 16 : Centro - Pinhal Interior Sul
AUT0016 = AUT - stratum 16 : TYPE 16 BHS landwirtschaftlich
KAZ0016 = KAZ - stratum 16 : Atyrauskaya oblast, kazakh only
BEL0116 = BEL - stratum 16 : Flanders/Tech or Voc/network comm. Schls/ISCED2
TAP0216 = TAP - stratum 16 : Mix. Sr. HS. Prv. Urb.
CHL0316 = CHL - stratum 16 : Private / Primary andSecondary / HS
VNM0316 = VNM - stratum 16 : Southern Viet Nam / Private / Urban
GBR1316 = QUK - stratum 16 : Wales, Independent, North
BRA0616 = BRA - stratum 16 : CEARÁ - FEDERAL/ESTADUAL
MEX0616 = MEX - REGION 06 stratum 16 : COLIMA, large schools
ESP0816 = ESP - stratum 16 : Castile-LaMancha,private,NA
TUR0026 = TUR - stratum 26 : TR8 VOCATIONAL AND TECHNICAL SECONDARY
KAZ0026 = KAZ - stratum 26 : Zhambylskaya oblast, kazakh only
BEL0226 = BEL - stratum 26 : French com/Special Ed
GBR1226 = QUK - stratum 26 : Northern Ireland, Maintained non-selective, North Eastern
CAN0326 = CAN - stratum 26 : prov 12 Fr. 18 to ...
MEX0926 = MEX - REGION 09 stratum 26 : DISTRITO FEDERAL, moderately small schools
KAZ0036 = KAZ - stratum 36 : Kostanayskaya oblast, russian only
MEX1236 = MEX - REGION 12 stratum 36 : GUERRERO, very small schools
BRA1336 = BRA - stratum 36 : MINAS GERAIS - FEDERAL/ESTADUAL
CAN0436 = CAN - stratum 36 : prov 13 Fr. 35 to 117
ESP1636 = ESP - stratum 36 : BasqueCountry, private, D
KAZ0046 = KAZ - stratum 46 : Pavlodarskaya oblast, both
CZE1646 = CZE - stratum 46 : 6-8yrGym/Region2/MSS andVSS
MEX1646 = MEX - REGION 16 stratum 46 : MICHOACAN, large schools
KAZ0056 = KAZ - stratum 56 : South-Kazakhstan oblast, russian and uzbek
CZE2156 = CZE - stratum 56 : 6-8yrGym/Region7/MSS andVSS
BRA1956 = BRA - stratum 56 : RIO DE JANEIRO - PRIVADA
MEX1956 = MEX - REGION 19 stratum 56 : NUEVO LEON, moderately small schools
MEX2266 = MEX - REGION 22 stratum 66 : QUERETARO, very small schools
BRA2366 = BRA - stratum 66 : RORAIMA - FEDERAL/ESTADUAL
CZE2666 = CZE - stratum 66 : 6-8yrGym/Region12/MSS andVSS
CAN0766 = CAN - stratum 66 : prov 46 Fr. 18 to ...
CZE3076 = CZE - stratum 76 : Voc-Conservatory with maturate/VSS
MEX2676 = MEX - REGION 26 stratum 76 : SONORA, large schools
CAN0876 = CAN - stratum 76 : prov 47 Fr. 9 to ...
CAN0986 = CAN - stratum 86 : prov 48 Fr. 9 to ...
MEX2986 = MEX - REGION 29 stratum 86 : TLAXCALA, moderately small schools
CAN1096 = CAN - stratum 96 : prov 59 Fr. 9 to ...
MEX3296 = MEX - REGION 32 stratum 96 : ZACATECAS, very small schools
ALB0007 = ALB - stratum 07 : Center, Rural, Public
MAC0007 = MAC - stratum 07 : Stratum 7: Private-not- in-Net, Grammar-International, Chinese
SWE0007 = SWE - stratum 07 : INDEP/ LOWER SEC/ METRO
IRL0007 = IRL - stratum 07 : Size <=40 / Vocational
ISL0007 = ISL - stratum 07 : Nágrenni Reykjavíkur / 17-35
SVN0007 = SVN - stratum 00 : IO-adult educational programme
RUS0007 = RUS - stratum 07 : Kabardino-Balkarian Republic
PRT0007 = PRT - stratum 07 : Centro - Baixo Mondego
AUT0007 = AUT - stratum 07 : TYPE 7 Berufsschulen kaufmännisch and gewerblich
URY0007 = URY - stratum 07 : Public Technical Secondary Schools,Lower secondary only
KAZ0007 = KAZ - stratum 07 : Almatinskaya oblast, kazakh only
GBR2007 = QSC - stratum 07 : Scotland 7-independent/lowest band
BEL0107 = BEL - stratum 07 : Flanders/Gen Ed and other type/private subsidized/ISCED2
CHL0107 = CHL - stratum 07 : Municipal / Secondary / HS-TP
TAP0107 = TAP - stratum 07 : Gen. Sr. HS. Prv. Rur.
GBR1107 = QUK - stratum 07 : England, Maintained non-selective, South
MEX9107 = MEX - REGION 91 stratum 07 : [NO Region 99 and above] Oth. Gen. Upp. Sec. Pub.
THA0207 = THA - stratum 07 : Department of Education of Bangkok Metropolitan Administration/Lower secondary
VNM0207 = VNM - stratum 07 : Central Viet Nam / Public / Urban
BRA0307 = BRA - stratum 07 : AMAPÁ - FEDERAL/ESTADUAL
MEX0307 = MEX - REGION 03 stratum 07 : BAJA CALIFORNIA SUR, large schools
ITA1307 = ITA - REGION 13 stratum 07 : [Region 13] Veneto (Rovigo) Tecnici
ESP0407 = ESP - stratum 07 : BalearicIslands, public, NA
FIN0017 = FIN - stratum 17 : Swedish/Not Aland-Rural-Low
TUN0017 = TUN - stratum 17 : Center-west/Periphery
PRT0017 = PRT - stratum 17 : Centro - Pinhal Litoral
KAZ0017 = KAZ - stratum 17 : Atyrauskaya oblast, russian only
BEL0117 = BEL - stratum 17 : Flanders/Tech or Voc/network comm. Schls/ISCED3
CHL0317 = CHL - stratum 17 : Private / Secondary / HS
VNM0317 = VNM - stratum 17 : Southern Viet Nam / Private / Rural
GBR1317 = QUK - stratum 17 : Wales, Independent, Powys and South West
MEX0617 = MEX - REGION 06 stratum 17 : COLIMA, moderately small schools
ESP0917 = ESP - stratum 17 : Catalonia, public, NA
ISL0027 = ISL - stratum 27 : Norðurland eystra / 17-35
KAZ0027 = KAZ - stratum 27 : Zhambylskaya oblast, russian only
BRA1027 = BRA - stratum 27 : MARANHÃO - FEDERAL/ESTADUAL
BEL0227 = BEL - stratum 27 : French com/Part-time Vocational Ed
GBR1227 = QUK - stratum 27 : Northern Ireland, Maintained non-selective, South Eastern
MEX0927 = MEX - REGION 09 stratum 27 : DISTRITO FEDERAL, very small schools
TUR0037 = TUR - stratum 37 : TRC GENERAL SECONDARY
KAZ0037 = KAZ - stratum 37 : Kostanayskaya oblast, both
BRA1337 = BRA - stratum 37 : MINAS GERAIS - MUNICIPAL
MEX1337 = MEX - REGION 13 stratum 37 : HIDALGO, large schools
CAN0437 = CAN - stratum 37 : prov 13 Fr. 118 to ...
KAZ0047 = KAZ - stratum 47 : North-Kazakhstan oblast, kazakh only
CAN0547 = CAN - stratum 47 : prov 24 Fr. 35 to ...
MEX1647 = MEX - REGION 16 stratum 47 : MICHOACAN, moderately small schools
CZE1747 = CZE - stratum 47 : 6-8yrGym/Region3/Large
KAZ0057 = KAZ - stratum 57 : South-Kazakhstan oblast, russian and kazakh and uzbek
BRA2057 = BRA - stratum 57 : RIO GRANDE DO NORTE - FEDERAL/ESTADUAL
CZE2257 = CZE - stratum 57 : 6-8yrGym/Region8/Large
CAN0657 = CAN - stratum 57 : prov 35 Fr. 35 to ...
MEX1957 = MEX - REGION 19 stratum 57 : NUEVO LEON, very small schools
MEX2367 = MEX - REGION 23 stratum 67 : QUINTANA ROO, large schools
CZE2767 = CZE - stratum 67 : 6-8yrGym/Region13/Large
CZE3177 = CZE - stratum 77 : Voc-Conservatory without maturate/Large
MEX2677 = MEX - REGION 26 stratum 77 : SONORA, moderately small schools
MEX2987 = MEX - REGION 29 stratum 87 : TLAXCALA, very small schools
USA9797 = Undisclosed STRATUM - United States of America
QUC9797 = Undisclosed STRATUM - Massachusetts (USA)
ARE9797 = Undisclosed STRATUM - United Arab Emirates
QRS9797 = Undisclosed STRATUM - Perm(Russian Federation)
RUS9797 = Undisclosed STRATUM - Russian Federation
ALB0008 = ALB - stratum 08 : Center, Rural, Private
MAC0008 = MAC - stratum 08 : Stratum 8: Private-not-in-Net, Grammar-International, English
GRC0008 = GRC - stratum 08 : Ionian islands public
SWE0008 = SWE - stratum 08 : INDEP/ LOWER SEC/ OTHER LARGE
IRL0008 = IRL - stratum 08 : Size 41-80 / Vocational
ISL0008 = ISL - stratum 08 : Nágrenni Reykjavíkur / > 35
TUR0008 = TUR - stratum 08 : TR3 GENERAL SECONDARY
AUT0008 = AUT - stratum 08 : TYPE 8 Berufsschulen landwirtschaftlich
URY0008 = URY - stratum 08 : Public Technical Secondary Schools,Mixed
KAZ0008 = KAZ - stratum 08 : Almatinskaya oblast, russian only
GBR2008 = QSC - stratum 08 : Scotland 8-independent/second lowest band
ARE0108 = ARE - stratum 08 : ABU DHABI,INDIAN,PRIVATE
BEL0108 = BEL - stratum 08 : Flanders/Gen Ed and other type/private subsidized /ISCED3
TAP0108 = TAP - stratum 08 : Gen. Sr. HS. Prv. Urb.
DEU0108 = DEU - stratum 08 : Mecklenburg-Vorpommern (MV) / NOR
GBR1108 = QUK - stratum 08 : England, Maintained non-selective, Greater London
MEX9108 = MEX - REGION 91 stratum 08 : [NO Region 99 and above] Cen. Fed. Tech. Upp. Sec. Pub.
THA0208 = THA - stratum 08 : Department of Education of Bangkok Metropolitan Administration/Mixed
CHL0208 = CHL - stratum 08 : Subsidized / Primary / Only Primary
VNM0208 = VNM - stratum 08 : Central Viet Nam / Public / Rural
MEX0308 = MEX - REGION 03 stratum 08 : BAJA CALIFORNIA SUR, moderately small schools
ITA1308 = ITA - REGION 13 stratum 08 : [Region 13] Veneto (Rovigo) Professionali
ESP0408 = ESP - stratum 08 : BalearicIslands, private, NA
PRT0018 = PRT - stratum 18 : Centro - Serra da Estrela
KAZ0018 = KAZ - stratum 18 : Atyrauskaya oblast, both
BEL0118 = BEL - stratum 18 : Flanders/Tech or Voc/network comm. Schls/Mixed ISCED
CHL0318 = CHL - stratum 18 : Private / Secondary / TP
GBR1318 = QUK - stratum 18 : Wales, Independent, South East
MEX0618 = MEX - REGION 06 stratum 18 : COLIMA, very small schools
ESP0918 = ESP - stratum 18 : Catalonia, private, NA
ISL0028 = ISL - stratum 28 : Norðurland eystra / > 35
TUR0028 = TUR - stratum 28 : TR9 GENERAL SECONDARY
KAZ0028 = KAZ - stratum 28 : Zhambylskaya oblast, both
MEX1028 = MEX - REGION 10 stratum 28 : DURANGO, large schools
GBR1228 = QUK - stratum 28 : Northern Ireland, Maintained non-selective, Southern
ARE0328 = ARE - stratum 28 : SHARJAH,INDIAN,PRIVATE
TUR0038 = TUR - stratum 38 : TRC VOCATIONAL AND TECHNICAL SECONDARY
KAZ0038 = KAZ - stratum 38 : Kyzyl-Ordinskaya oblast, kazakh only
BRA1338 = BRA - stratum 38 : MINAS GERAIS - PRIVADA
MEX1338 = MEX - REGION 13 stratum 38 : HIDALGO, moderately small schools
ESP1738 = ESP - stratum 38 : Valencia, private, NA
KAZ0048 = KAZ - stratum 48 : North-Kazakhstan oblast, russian only
ARE0548 = ARE - stratum 48 : UMM AL QUWAIN,INDIAN,PRIVATE
MEX1648 = MEX - REGION 16 stratum 48 : MICHOACAN, very small schools
BRA1748 = BRA - stratum 48 : PERNAMBUCO - FEDERAL/ESTADUAL
CZE1748 = CZE - stratum 48 : 6-8yrGym/Region3/MSS andVSS
KAZ0058 = KAZ - stratum 58 : South-Kazakhstan oblast, russian and kazakh and other
BRA2058 = BRA - stratum 58 : RIO GRANDE DO NORTE - MUNICIPAL
MEX2058 = MEX - REGION 20 stratum 58 : OAXACA, large schools
CZE2258 = CZE - stratum 58 : 6-8yrGym/Region8/MSS andVSS
ARE0658 = ARE - stratum 58 : RAS AL KHAIMAH,INDIAN,PRIVATE
MEX2368 = MEX - REGION 23 stratum 68 : QUINTANA ROO, moderately small schools
ARE0768 = ARE - stratum 68 : FUJAIRAH,INDIAN,PRIVATE
CZE2768 = CZE - stratum 68 : 6-8yrGym/Region13/MSS andVSS
RUS0078 = RUS - stratum 78 : The City of Sankt-Petersburg
CZE3178 = CZE - stratum 78 : Voc-Conservatory without maturate/MSS
MEX2678 = MEX - REGION 26 stratum 78 : SONORA, very small schools
BRA2778 = BRA - stratum 78 : TOCANTINS - FEDERAL/ESTADUAL
MEX3088 = MEX - REGION 30 stratum 88 : VERACRUZ, large schools
MAC0009 = MAC - stratum 09 : Stratum 9: Private-not-in-Net, Grammar-International, Portuguese
SWE0009 = SWE - stratum 09 : INDEP/ LOWER SEC/ AT LEAST 12500
IRL0009 = IRL - stratum 09 : Size > 80 / Vocational
TUR0009 = TUR - stratum 09 : TR3 VOCATIONAL AND TECHNICAL SECONDARY
RUS0009 = RUS - stratum 09 : Karachaevo-Chercessian Republic
PRT0009 = PRT - stratum 09 : Centro - Beira Interior Norte
AUT0009 = AUT - stratum 09 : TYPE 9 BMS gewerblich
URY0009 = URY - stratum 09 : Public Technical Secondary Schools,Upper secondary only
KAZ0009 = KAZ - stratum 09 : Almatinskaya oblast, both
GBR2009 = QSC - stratum 09 : Scotland 9-independent/middle band
ARE0109 = ARE - stratum 09 : ABU DHABI,OTHER,PUBLIC
BEL0109 = BEL - stratum 09 : Flanders/Gen Ed and other type/private subsidized /Mixed ISCED
TAP0109 = TAP - stratum 09 : Voc. Sr. HS. Pub. Rur.
DEU0109 = DEU - stratum 09 : Niedersachsen (NI) / NOR
GBR1109 = QUK - stratum 09 : England, Independent, North
MEX9109 = MEX - REGION 91 stratum 09 : [NO Region 99 and above] Oth. Tech. Upp. Sec. Pub.
THA0209 = THA - stratum 09 : Bureau of Local Educational Development and Co-ordination/ Lower Secondary
CHL0209 = CHL - stratum 09 : Subsidized / Primary andSecondary / HS
VNM0209 = VNM - stratum 09 : Central Viet Nam / Public / Remote area
MEX0309 = MEX - REGION 03 stratum 09 : BAJA CALIFORNIA SUR, very small schools
ITA1309 = ITA - REGION 13 stratum 09 : [Region 13] Veneto (Rovigo) Medie
ESP0509 = ESP - stratum 09 : CanaryIslands, public, NA
TUR0019 = TUR - stratum 19 : TR6 GENERAL SECONDARY
PRT0019 = PRT - stratum 19 : Lisboa - Grande Lisboa
KAZ0019 = KAZ - stratum 19 : East-Kazakhstan oblast, kazakh only
ESP1019 = ESP - stratum 19 : Extremadura, public, NA
BEL0119 = BEL - stratum 19 : Flanders/Special Ed/ private subsidized
GBR1219 = QUK - stratum 19 : Northern Ireland, Maintained selective, Belfast
BRA0719 = BRA - stratum 19 : DISTRITO FEDERAL - FEDERAL/ESTADUAL
MEX0719 = MEX - REGION 07 stratum 19 : CHIAPAS, large schools
TUR0029 = TUR - stratum 29 : TR9 VOCATIONAL AND TECHNICAL SECONDARY
PRT0029 = PRT - stratum 29 : Região Autónoma da Madeira
KAZ0029 = KAZ - stratum 29 : West-Kazakhstan oblast, kazakh only
MEX1029 = MEX - REGION 10 stratum 29 : DURANGO, moderately small schools
GBR1229 = QUK - stratum 29 : Northern Ireland, Independent
BEL0329 = BEL - stratum 29 : German com/Special Ed
KAZ0039 = KAZ - stratum 39 : Kyzyl-Ordinskaya oblast, russian only
MEX1339 = MEX - REGION 13 stratum 39 : HIDALGO, very small schools
BRA1439 = BRA - stratum 39 : PARÁ - FEDERAL/ESTADUAL
ESP1839 = ESP - stratum 39 : CeutaandMelilla, public, NA
KAZ0049 = KAZ - stratum 49 : North-Kazakhstan oblast, both
BRA1749 = BRA - stratum 49 : PERNAMBUCO - MUNICIPAL
MEX1749 = MEX - REGION 17 stratum 49 : MORELOS, large schools
CZE1849 = CZE - stratum 49 : 6-8yrGym/Region4/Large
BRA2059 = BRA - stratum 59 : RIO GRANDE DO NORTE - PRIVADA
MEX2059 = MEX - REGION 20 stratum 59 : OAXACA, moderately small schools
CZE2359 = CZE - stratum 59 : 6-8yrGym/Region9/Large
ARE0659 = ARE - stratum 59 : RAS AL KHAIMAH,OTHER,PUBLIC
MEX2369 = MEX - REGION 23 stratum 69 : QUINTANA ROO, very small schools
BRA2469 = BRA - stratum 69 : SANTA CATARINA - FEDERAL/ESTADUAL
ARE0769 = ARE - stratum 69 : FUJAIRAH,OTHER,PUBLIC
CZE2869 = CZE - stratum 69 : 6-8yrGym/Region14/Large
RUS0079 = RUS - stratum 79 : Jewish autonomous region
CZE3179 = CZE - stratum 79 : Voc-Conservatory without maturate/VSS
BRA2779 = BRA - stratum 79 : TOCANTINS - MUNICIPAL
MEX2779 = MEX - REGION 27 stratum 79 : TABASCO, large schools
MEX3089 = MEX - REGION 30 stratum 89 : VERACRUZ, moderately small schools

OECD country
0 = Non-OECD
1 = OECD

National Centre 6-digit Code
189001 = One of the other former Yugoslav republics (HRV)
100201 = African country with Portuguese as the official language
178401 = Another State of the Gulf Cooperation Council (ARE)
115002 = Another country within the European Union (ITA)
189002 = One of the other former Yugoslav republics (SRB)
100202 = A Sub-Saharan country (Africa excl. Maghreb)
064302 = Another region of the Russian Federation
015602 = Another province in mainland China (QCN)
115005 = A European country that is not a member of the European Union
015605 = Another province in mainland China (QCH)
115106 = An Eastern European country outside the EU
115009 = Another country within the European Union (MLT)

International Grade
96 = Ungraded
98 = Invalid
99 = Missing

National Study Programme
97 = N/A
98 = Invalid
99 = Missing

Birth -Year
9997 = N/A
9998 = Invalid
9999 = Missing

Gender
1 = Female
2 = Male
7 = N/A
8 = Invalid
9 = Missing

Attend <ISCED 0>
1 = No
2 = Yes, for one year or less
3 = Yes, for more than one year
7 = N/A
8 = Invalid
9 = Missing

Repeat - <ISCED 1>
1 = No, never
2 = Yes, once
3 = Yes, twice or more
7 = N/A
8 = Invalid
9 = Missing

Truancy - Late for School
1 = None
2 = One or two times
3 = Three or four times
4 = Five or more times
7 = N/A
8 = Invalid
9 = Missing

At Home - Mother
1 = Yes
2 = No
7 = N/A
8 = Invalid
9 = Missing

Mother<Highest Schooling>
1 = <ISCED level 3A>
2 = <ISCED level 3B, 3C>
3 = <ISCED level 2>
4 = <ISCED level 1>
5 = She did not complete <ISCED level 1>
7 = N/A
8 = Invalid
9 = Missing

Mother Current Job Status
1 = Working full-time <for pay>
2 = Working part-time <for pay>
3 = Not working, but looking for a job
4 = Other (e.g. home duties, retired)
7 = N/A
8 = Invalid
9 = Missing

Father<Highest Schooling>
1 = <ISCED level 3A>
2 = <ISCED level 3B, 3C>
3 = <ISCED level 2>
4 = <ISCED level 1>
5 = He did not complete <ISCED level 1>
7 = N/A
8 = Invalid
9 = Missing

Country of Birth - Self
1 = Country of test
2 = Other country
7 = N/A
8 = Invalid
9 = Missing

International Language at Home
1 = Language of the test
2 = Other language
7 = N/A
8 = Invalid
9 = Missing

Possessions - <Country item 1>
0620001 = Portugal : Cable TV or television by parabolic antenna - Yes
0040001 = Austria : A laptop/notebook of your own - Yes
0840001 = United States of America : A guest room - Yes
0352001 = Iceland : Security watch or system - Yes
0372001 = Ireland : A flat-screen television - Yes
0792001 = Turkey : air-conditioned type heating and cooling system - Yes
0203001 = Czech Republic : Your own notebook (laptop) - Yes
0643001 = Russian Federation : Digital camera or video camera - Yes
0344001 = Hong Kong-China : Plasma TV/LCD TV (40' or above) - Yes
0554001 = New Zealand : Pay television (e.g. Sky, Saturn) - Yes
0484001 = Mexico : Cable TV (Sky, Cablevisión, etc.) - Yes
0784001 = United Arab Emirates : A laptop of your own - Yes
0616001 = Poland : Satellite or cable TV with at least 30 channels - Yes
0036001 = Australia : iPad or other tablet device - Yes
0056001 = Belgium : A home cinema set (LCD or LED screen with home cinema system) - Yes
0756001 = Switzerland : Musical instrument (excluding Recorder) - Yes
0276001 = Germany : electronical devices for playing (Playstation, Nintendo, X-Box, Wii) - Yes
0208001 = Denmark : An instrument (e.g. piano, guitar, violin) - Yes
0528001 = Netherlands : an alarm system on the house - Yes
0438001 = Liechtenstein : Musical instrument (excluding Recorder) - Yes
0348001 = Hungary : Video games console (e.g. Sony Play Station TM) - Yes
0826101 = United Kingdom (excl.Scotland) : A premium TV package (e.g. Sky Movies, Sky Sports) - Yes
0826201 = Scotland : A premium TV package (e.g. Sky Movies, Sky Sports) - Yes
0056011 = Belgium : A plasma, LCD or LED television - Yes
0620002 = Portugal : Cable TV or television by parabolic antenna - No
0040002 = Austria : A laptop/notebook of your own - No
0840002 = United States of America : A guest room - No
0792002 = Turkey : air-conditioned type heating and cooling system - No
0203002 = Czech Republic : Your own notebook (laptop) - No
0643002 = Russian Federation : Digital camera or video camera - No
0344002 = Hong Kong-China : Plasma TV/LCD TV (40' or above) - No
0554002 = New Zealand : Pay television (e.g. Sky, Saturn) - No
0484002 = Mexico : Cable TV (Sky, Cablevisión, etc.) - No
0784002 = United Arab Emirates : A laptop of your own - No
0616002 = Poland : Satellite or cable TV with at least 30 channels - No
0036002 = Australia : iPad or other tablet device - No
0056002 = Belgium : A home cinema set (LCD or LED screen with home cinema system) - No
0756002 = Switzerland : Musical instrument (excluding Recorder) - No
0276002 = Germany : electronical devices for playing (Playstation, Nintendo, X-Box, Wii) - No
0208002 = Denmark : An instrument (e.g. piano, guitar, violin) - No
0528002 = Netherlands : an alarm system on the house - No
0438002 = Liechtenstein : Musical instrument (excluding Recorder) - No
0348002 = Hungary : Video games console (e.g. Sony Play Station TM) - No
0826102 = United Kingdom (excl.Scotland) : A premium TV package (e.g. Sky Movies, Sky Sports) - No
0826202 = Scotland : A premium TV package (e.g. Sky Movies, Sky Sports) - No
0056012 = Belgium : A plasma, LCD or LED television - No

Possessions - <Country item 2>
0410001 = Korea : Digital TV(eg: PDP, LCD,LED) - Yes
0620001 = Portugal : Plasma or LCD television - Yes
0040001 = Austria : Electronic devices for playing (Playstation, Nintendo, Xbox, Wii) - Yes
0440001 = Lithuania : Press. Subscription edition (newspaper, magazine). - Yes
0840001 = United States of America : A high-speed Internet connection - Yes
0250001 = France : A digital camera (not installed in a mobile phone) - Yes
0170001 = Colombia : Cable TV or Direct to Home TV - Yes
0372001 = Ireland : A bedroom with an en-suite bathroom - Yes
0703001 = Slovak Republic : digital camera (not as a part of a mobile phone, but separate one) - Yes
0124001 = Canada : A subscription to a daily newspaper - Yes
0554001 = New Zealand : Do you and your family have a holiday away from home for at least one week each year? (Yes/No) - Yes
0784001 = United Arab Emirates : Electronic games (Wii, Xbox) - Yes
0705001 = Slovenia : Attending an extra out-of-school-time activities paid by your parents. - Yes
0036001 = Australia : A home gym and/or gym membership - Yes
0008001 = Albania : cultural television programs with payment - Yes
0348001 = Hungary : Tablet computer (e.g. iPad, Samsung Galaxy Tab, BlackBerry) - Yes
0188001 = Costa Rica : A console of video games - Yes
0826101 = United Kingdom (excl.Scotland) : A high-definition (HD) TV - Yes
0826201 = Scotland : A tablet computer (e.g. iPad) - Yes
0156011 = Shanghai-China : digital camera or digital video recorder - Yes
0410002 = Korea : Digital TV(eg: PDP, LCD,LED) - No
0620002 = Portugal : Plasma or LCD television - No
0040002 = Austria : Electronic devices for playing (Playstation, Nintendo, Xbox, Wii) - No
0440002 = Lithuania : Press. Subscription edition (newspaper, magazine). - No
0840002 = United States of America : A high-speed Internet connection - No
0250002 = France : A digital camera (not installed in a mobile phone) - No
0170002 = Colombia : Cable TV or Direct to Home TV - No
0372002 = Ireland : A bedroom with an en-suite bathroom - No
0703002 = Slovak Republic : digital camera (not as a part of a mobile phone, but separate one) - No
0124002 = Canada : A subscription to a daily newspaper - No
0554002 = New Zealand : Do you and your family have a holiday away from home for at least one week each year? (Yes/No) - No
0784002 = United Arab Emirates : Electronic games (Wii, Xbox) - No
0705002 = Slovenia : Attending an extra out-of-school-time activities paid by your parents. - No
0036002 = Australia : A home gym and/or gym membership - No
0008002 = Albania : cultural television programs with payment - No
0348002 = Hungary : Tablet computer (e.g. iPad, Samsung Galaxy Tab, BlackBerry) - No
0188002 = Costa Rica : A console of video games - No
0826102 = United Kingdom (excl.Scotland) : A high-definition (HD) TV - No
0826202 = Scotland : A tablet computer (e.g. iPad) - No
0156012 = Shanghai-China : digital camera or digital video recorder - No

Possessions - <Country item 3>
0410001 = Korea : Kimchi refrigerator (for maturing) --> Air Cleaner machine - Yes
0840001 = United States of America : A musical instrument - Yes
0702001 = Singapore : Domestic helper (e.g. full/part-time maid) - Yes
0442001 = Luxembourg : Playstation 3® or Wii® - Yes
0352001 = Iceland : Flat screen or projector - Yes
0372001 = Ireland : A premium cable TV package (e.g., Sky Movies, Sky Sports - Yes
0203001 = Czech Republic : Home cinema (screen, DVD, player, speakers) - Yes
0643001 = Russian Federation : Satellite antenna - Yes
0554001 = New Zealand : Do your parents own a holiday home? (Please tick only one box) - Yes
0705001 = Slovenia : Travelling abroad for one week or more. - Yes
0756001 = Switzerland : A digital video camera - Yes
0438001 = Liechtenstein : A digital video camera - Yes
0348001 = Hungary : Digital camera (not part of a phone) - Yes
0858001 = Uruguay : Laptop (XO Ceibal not included) - Yes
0826101 = United Kingdom (excl.Scotland) : A tablet computer (e.g. iPad) - Yes
0826201 = Scotland : A musical instrument (e.g. piano, violin) - Yes
0410002 = Korea : Kimchi refrigerator (for maturing) --> Air Cleaner machine - No
0840002 = United States of America : A musical instrument - No
0702002 = Singapore : Domestic helper (e.g. full/part-time maid) - No
0442002 = Luxembourg : Playstation 3® or Wii® - No
0372002 = Ireland : A premium cable TV package (e.g., Sky Movies, Sky Sports - No
0203002 = Czech Republic : Home cinema (screen, DVD, player, speakers) - No
0643002 = Russian Federation : Satellite antenna - No
0554002 = New Zealand : Do your parents own a holiday home? (Please tick only one box) - No
0705002 = Slovenia : Travelling abroad for one week or more. - No
0756002 = Switzerland : A digital video camera - No
0438002 = Liechtenstein : A digital video camera - No
0348002 = Hungary : Digital camera (not part of a phone) - No
0858002 = Uruguay : Laptop (XO Ceibal not included) - No
0826102 = United Kingdom (excl.Scotland) : A tablet computer (e.g. iPad) - No
0826202 = Scotland : A musical instrument (e.g. piano, violin) - No

How many - cellular phones
1 = None
2 = One
3 = Two
4 = Three or more
7 = N/A
8 = Invalid
9 = Missing

How many books at home
1 = 0-10 books
2 = 11-25 books
3 = 26-100 books
4 = 101-200 books
5 = 201-500 books
6 = More than 500 books
7 = N/A
8 = Invalid
9 = Missing

Maths Interest - Enjoy Reading
1 = Strongly agree
2 = Agree
3 = Disagree
4 = Strongly disagree
7 = N/A
8 = Invalid
9 = Missing

Maths Self-Efficacy - Using a <Train Timetable>
1 = Very confident
2 = Confident
3 = Not very confident
4 = Not at all confident
7 = N/A
8 = Invalid
9 = Missing

Attributions to Failure - Not Good at Maths Problems
1 = Very Likely
2 = Likely
3 = Slightly likely
4 = Not at all likely
7 = N/A
8 = Invalid
9 = Missing

Maths Intentions - Mathematics vs. Language Courses After School
1 = Courses after school Math
2 = Courses after school Test Language
7 = N/A
8 = Invalid
9 = Missing

Maths Intentions - Mathematics vs. Science Related Major in College
1 = Major in college Math
2 = Major in college Science
7 = N/A
8 = Invalid
9 = Missing

Maths Intentions - Study Harder in Mathematics vs. Language Classes
1 = Study harder Math
2 = Study harder Test Language
7 = N/A
8 = Invalid
9 = Missing

Maths Intentions - Take Maximum Number of Mathematics vs. Science Classes
1 = Maximum classes Math
2 = Maximum classes Science
7 = N/A
8 = Invalid
9 = Missing

Maths Intentions - Pursuing a Career That Involves Mathematics vs. Science
1 = Pursuing a career Math
2 = Pursuing a career Science
7 = N/A
8 = Invalid
9 = Missing

Maths Behaviour - Talk about Maths with Friends
1 = Always or almost always
2 = Often
3 = Sometimes
4 = Never or rarely
7 = N/A
8 = Invalid
9 = Missing

Learning Strategies - Important Parts vs. Existing Knowledge vs. Learn by Heart
1 = Most important
2 = relating to known
3 = by heart
7 = N/A
8 = Invalid
9 = Missing

Learning Strategies - Improve Understanding vs. New Ways vs. Memory
1 = Improve understanding
2 = new ways
3 = check memory
7 = N/A
8 = Invalid
9 = Missing

Learning Strategies - Other Subjects vs. Learning Goals vs. Rehearse Problems
1 = Relating to other subjects
2 = learning goals
3 = in my sleep
7 = N/A
8 = Invalid
9 = Missing

Learning Strategies - Repeat Examples vs. Everyday Applications vs. More Information
1 = Repeat examples
2 = everyday life
3 = more information
7 = N/A
8 = Invalid
9 = Missing

Out of school lessons - <test lang>
1 = I do not attend <out-of-school time lessons> in this subject
2 = Less than 2 hours a week
3 = 2 or more but less than 4 hours a week
4 = 4 or more but less than 6 hours a week
5 = 6 or more hours a week
7 = N/A
8 = Invalid
9 = Missing

Experience with Applied Maths Tasks - Use <Train Timetable>
1 = Frequently
2 = Sometimes
3 = Rarely
4 = Never
7 = N/A
8 = Invalid
9 = Missing

Familiarity with Maths Concepts - Exponential Function
1 = Never heard of it
2 = Heard of it once or twice
3 = Heard of it a few times
4 = Heard of it often
5 = Know it well, understand the concept
7 = N/A
8 = Invalid
9 = Missing

Maths Teaching - Teacher shows interest
1 = Every Lesson
2 = Most Lessons
3 = Some Lessons
4 = Never or Hardly Ever
7 = N/A
8 = Invalid
9 = Missing

Perseverance - Give up easily
1 = Very much like me
2 = Mostly like me
3 = Somewhat like me
4 = Not much like me
5 = Not at all like me
7 = N/A
8 = Invalid
9 = Missing

Problem Text Message - Press every button
1 = definitely do this
2 = probably do this
3 = probably not do this
4 = definitely not do this
7 = N/A
8 = Invalid
9 = Missing

At Home - Desktop Computer
1 = Yes, and I use it
2 = Yes, but I don’t use it
3 = No
7 = N/A
8 = Invalid
9 = Missing

First use of computers
1 = 6 years old or younger
2 = 7-9 years old
3 = 10-12 years old
4 = 13 years old or older
5 = Never
7 = N/A
8 = Invalid
9 = Missing

Internet at School
01 = No time
02 = 1-30 minutes
03 = 31-60 minutes
04 = Between 1 and 2 hours
05 = Between 2 and 4 hours
06 = Between 4 hours and 6 hours
07 = More than 6 hours
97 = N/A
98 = Invalid
99 = Missing

Out-of-school 8 - One player games.
1 = Never or hardly ever
2 = Once or twice a month
3 = Once or twice a week
4 = Almost every day
5 = Every day
7 = N/A
8 = Invalid
9 = Missing

Maths lessons - Draw graph
1 = Yes, students did this
2 = Yes, but only the teacher demonstrated this
3 = No
7 = N/A
8 = Invalid
9 = Missing

Future Orientation - Internship
1 = Yes
2 = No, never
7 = N/A
8 = Invalid
9 = Missing

Acquired skills - Find job info - Yes, at school
1 = Tick
2 = No tick
7 = N/A
8 = Invalid

First language learned
1 = <test language> or <other official national language(s) or dialect(s)>
2 = <test language> or <other official national language(s) or dialect(s)> and another language
3 = other than <test language> or <other official national language(s) or dialect(s)>
7 = N/A
8 = Invalid
9 = Missing

Age started learning <test language>
1 = 0 to 3 years
2 = 4 to 6 years
3 = 7 to 9 years
4 = 10 to 12 years
5 = 13 years or older
7 = N/A
8 = Invalid
9 = Missing

Language spoken - Mother
1 = Mostly <heritage language>
2 = About equally <heritage language> and <test language>
3 = Mostly <test language>
4 = Not applicable
7 = N/A
8 = Invalid
9 = Missing

Amount of support <test language>
1 = None
2 = Less than 2
3 = 2 or more but less than 4
4 = 4 or more but less than 6
5 = 6 or more
7 = N/A
8 = Invalid
9 = Missing

Acculturation - Mother Immigrant (Filter)
1 = No
2 = Yes
7 = N/A
8 = Invalid
9 = Missing

Calculator Use
1 = No calculator
2 = A Simple calculator
3 = A Scientific calculator
4 = A Graphics calculator
5 = A CAS calculator
7 = N/A
8 = Invalid
9 = Missing

Student Questionnaire Form
1 = StQ Form A
2 = StQ Form B
3 = StQ Form C
5 = StQ Form UH
9 = Missing

Booklet ID
1 = booklet 1
2 = booklet 2
3 = booklet 3
4 = booklet 4
5 = booklet 5
6 = booklet 6
7 = booklet 7
8 = booklet 8
9 = booklet 9
10 = booklet 10
11 = booklet 11
12 = booklet 12
13 = booklet 13
20 = UH booklet
21 = booklet 21
22 = booklet 22
23 = booklet 23
24 = booklet 24
25 = booklet 25
26 = booklet 26
27 = booklet 27
99 = Missing

Standard or simplified set of booklets
0 = Standard set of booklets
1 = Easier set of booklets

Grade compared to modal grade in country
99 = Missing

Unique national study programme code
00320010 = Argentina: General programme - Upper secondary
00560010 = Belgium: Special secondary education - lower secondary (training form 3 / first 3 years)
02760010 = Germany: Lower secondary with access to upper secondary
03760010 = Israel: Ultra Orthodox- Higher education- Girls
08261010 = United Kingdom (excl.Scotland): Students below Year 10 - Wales
00560020 = Belgium: Special secondary education (training form 3) (Fr Com only)
03800001 = Italy: Scientific, Classical, Social Science, Scientific-technological, Linguistic,Art High School,Art Institutes
06420001 = Romania: General education, leading to the continuation of studies
06430001 = Russian Federation: Programme of basic general education (Lower secondary)
06040001 = Peru: Lower secondary education. Includes regular, alternately and distance program.
01240001 = Canada: Grades 7 - 9 (Quebec: Secondary 1 – 3 )
03440001 = Hong Kong-China: Lower Secondary in G and I Sch.
07840001 = United Arab Emirates: Secondary education (lower)
07050001 = Slovenia: Secondary general education - general and classical gymnasiums
00360001 = Australia: Lower secondary general academic
04460001 = Macao-China: Grammar or International Program at Lower Secondary Levels
00560001 = Belgium: (First year A of first stage of) General Education
07560001 = Switzerland: Secondary education, First stage
02760001 = Germany: Lower secondary with access to upper secondary (comprehensive)
03760001 = Israel: Primary + Lower secondary education, grades 1-8
02080001 = Denmark: Primary and lower secondary (public school, private school)
05280001 = Netherlands: practical preparation for labour market
07880001 = Tunisia: Enseignement preparatoire (lower secondary)
03980001 = Kazakhstan: Programm of basic secondary education (5-9 grades);
04990001 = Montenegro: lower secondary or second stage of compulsory basic education
08261001 = United Kingdom (excl.Scotland): Students studying mostly toward GCSE or equivalent level 1 or 2 qual.
08262001 = Scotland: Standard Grades or Access 3 or Intermediates
06430101 = Perm (Russian Federation): Programme of basic general education (Lower secondary)
01560101 = China (Shanghai): Lower secondary general
01560401 = China (Beijing): Secondary education (lower)
00400011 = Austria: Vocational school for apprentices
00320011 = Argentina: Vocational programme - Lower secondary
00560011 = Belgium: Special secondary education - upper secondary (training form 3 / years 4 and 5)
02760011 = Germany: Upper secondary level of education
08261011 = United Kingdom (excl.Scotland): Students below Year 11 - Northern Ireland
00560021 = Belgium: First, second and third degrees of Special secondary education ( form 4) (Fr Com only)
01000002 = Bulgaria: Secondary education - general non-profiled (upper)
04400002 = Lithuania: Secondary School (Lower Secondary)
01700002 = Colombia: Secondary education (upper), academic
01910002 = Croatia: Four year vocational programmes
00320002 = Argentina: GBE 3rd cycle - Lower secondary
06420002 = Romania: Lower Secondary education, it continues the Gymnasium to the first part of the High School
03520002 = Iceland: Stúdentspróf. Matriculation examination certificate (granting access to university studies)
07520002 = Sweden: Upper secondary school, general orientation
03920002 = Japan: College of Technology (First 3 years)
02030002 = Czech Republic: 6, 8-year gymnasium and 8-year conservatory (lower secondary)
07030002 = Slovak Republic: Vocational Basic school
06430002 = Russian Federation: Programme of secondary general education (Upper secondary)
06040002 = Peru: Upper secondary education. Includes regular, alternately and distance program.
01240002 = Canada: Grades 10 - 12 (Quebec: Secondary 4 and 5, Newfoundland and Labrador: Level I - III)
07240002 = Spain: Initial Vocational Qualification Programme
03440002 = Hong Kong-China: Upper Secondary in G and I Sch.
07840002 = United Arab Emirates: Secondary Education ( upper)
07050002 = Slovenia: Secondary general education - technical gymnasiums
00360002 = Australia: Lower secondary with some VET subjects
02460002 = Finland: Comprehensive secondary school, additional education
04460002 = Macao-China: Grammar or International Program at Higher Secondary Levels
00560002 = Belgium: (First year B of first stage of General Education) – Special needs
07560002 = Switzerland: Preparatory course for vocational education
02760002 = Germany: Lower secondary without access to upper secondary, providing a basic general education (grade 5 - 10)
03760002 = Israel: Primary + Lower secondary education, grades 1-9
05280002 = Netherlands: general vocational oriented;in next year tracks into BB, KB, GL, TL
03480002 = Hungary: Grammar school 1 (4-5 years long)
08580002 = Uruguay: Lower Secondary with a technological component
01880002 = Costa Rica: Secondary education (upper) academic
07880002 = Tunisia: Enseignement secondaire (upper secondary)
03980002 = Kazakhstan: Programm of general secondary education (10-11 grades of gen. sec. schools, gymnasiums, lyceums ...)
04990002 = Montenegro: general upper secondary school
08261002 = United Kingdom (excl.Scotland): Students studying mostly towards a level 1 Diploma
06430102 = Perm (Russian Federation): Programme of secondary general education (Upper secondary)
01560102 = China (Shanghai): Upper secondary general
01560402 = China (Beijing): Secondary education (upper)
00400012 = Austria: Intermediate technical and vocational school
00320012 = Argentina: Vocational programme - Upper secondary
00560012 = Belgium: First degree of general education (Fr/Ger)
02760012 = Germany: Lower secondary without access to upper secondary, providing a basic general education (grades 5 - 10)
00560022 = Belgium: Special secondary education (lower secondary) (Germ Com only)
01000003 = Bulgaria: Secondary education - general profiled (upper)
03000003 = Greece: Technical-Vocational Schools Upper secondary education
04400003 = Lithuania: Secondary School (Upper Secondary)
01700003 = Colombia: Secondary education (upper), technical
03800003 = Italy: Vocational Institute, Art Institute (Industry and Craft Workers)
00320003 = Argentina: Polimodal (all orientations except 'Producción de Bienes y Servicios' with TTP - Upper Secondary
01520003 = Chile: Second cycle of upper secondary education, academic orientation
07520003 = Sweden: Upper secondary school, vocational orientation
03920003 = Japan: Upper secondary school (Vocational)
02030003 = Czech Republic: 6, 8-year gymnasium (upper secondary)
07030003 = Slovak Republic: Secondary school (ISCED 2)
02330003 = Estonia: Vocational upper secondary education
06430003 = Russian Federation: Programme of initial professional education (professional schools, ets.)
06040003 = Peru: Alternative Basic Education-Advanced cycle. Includes Adults secondary program.
07640003 = Thailand: Vocational Certificate level (Cert. of VOC.)
04840003 = Mexico: General Lower Secondary by Television
07840003 = United Arab Emirates: Secondary education (technical )
00360003 = Australia: Upper secondary general academic
04460003 = Macao-China: Technical or Prevocational Program at Lower Secondary Levels
00560003 = Belgium: Second year of first stage - preparing for vocational secondary education
07560003 = Switzerland: School preparing for the university entrance certificate
02760003 = Germany: Lower secondary without access to upper secondary, providing an extensive general education (grades 5- 10)
03760003 = Israel: Lower secondary education, grades 7-9
00080003 = Albania: Secondary education, vocational variant
02080003 = Denmark: Education at a production school
05280003 = Netherlands: admission to ISCED 3 MBO level 1-3, post-sec., non-tert., leads to a lower qualification than GL/TL stud.
03480003 = Hungary: Grammar school 2 (6 years long)
01580003 = Chinese Taipei: Vocational senior high school
08580003 = Uruguay: Lower Secondary with a very important technological component
01880003 = Costa Rica: Secondary education (upper) technical
03980003 = Kazakhstan: Programme of technical and vocational education (professional school and professional lyceum).
04990003 = Montenegro: 4-year vocational secondary school
08261003 = United Kingdom (excl.Scotland): Students studying mostly towards a level 2 Diploma
08262003 = Scotland: National Progression Award or National Certificate at level 3 to 5
06430103 = Perm (Russian Federation): Programme of initial professional education (professional schools, ets.)
01560103 = China (Shanghai): Upper secondary vocational
00400013 = Austria: Intermediate technical and vocational school
00320013 = Argentina: Adult Education - General Programme Upper Secondary
00560013 = Belgium: First degree of remedial education(Fr),First or second year B special needs (Ger)
02760013 = Germany: Lower secondary without access to upper secondary, providing an extensive general education (grades 5 - 10)
00560023 = Belgium: Special secondary education (upper secondary) (Germ Com only)
01000004 = Bulgaria: Secondary education - vocational (upper)
01910004 = Croatia: Vocational programmes for industry
00320004 = Argentina: Polimodal Orientation 'Producción de Bienes y Servicios' con TTP - Upper sec. - 1st to 3rd year (new)
04420004 = Luxembourg: A 3-year vocational education
01520004 = Chile: Second cycle of upper secondary education, technical orientation
07520004 = Sweden: Upper secondary school, introduction programmes
03920004 = Japan: Secondary school (Upper division)
07030004 = Slovak Republic: Secondary school (ISCED 3)
06430004 = Russian Federation: Programme of secondary professional education (technikum, colledge, ets.)
06040004 = Peru: Technical Productive Education-Middle cycle
07240004 = Spain: Intermediate Level Vocational Training
04840004 = Mexico: General Baccalaureate or Upper Secondary
07050004 = Slovenia: Vocational education programmes of medium duration - school type and dual type/apprenticeship organisation
00360004 = Australia: Upper secondary with some VET subjects
02460004 = Finland: Upper secondary vocational school
04460004 = Macao-China: Technical or Prevocational Program at Higher Secondary Levels
00560004 = Belgium: Second year of first stage preparing for regular secondary education
07560004 = Switzerland: Vocational baccalaureat, dual system 3-4 years
02760004 = Germany: Lower secondary with access to upper secondary
03760004 = Israel: Upper secondary education, grades 10-12
02080004 = Denmark: Upper secondary education (general, commercial, technical)
05280004 = Netherlands: admission to ISCED 3 MBO level 1-3
03480004 = Hungary: Grammar school 2 (6 years long)
01580004 = Chinese Taipei: Five-year college (not including the last two years)
03980004 = Kazakhstan: Programme of technical and vocational education (colledge and uchilische).
04990004 = Montenegro: 3-year vocational secondary school
08261004 = United Kingdom (excl.Scotland): Students studying mostly towards a level 3 Diploma
08262004 = Scotland: National Progression Award or National Certificate at level 6
06430104 = Perm (Russian Federation): Programme of secondary professional education (technikum, colledge, ets.)
01560104 = China (Shanghai): 6/7 years secondary vocational
00400014 = Austria: Intermediate technical and vocational school
00320014 = Argentina: Adult Education - Non Regular Education
00560014 = Belgium: Complementary year to 1st degree (Fr only)
02760014 = Germany: Lower secondary without access to upper secondary, providing a basic general education (grades 5 - 10)
00560024 = Belgium: Part-time Vocational Education (Germ Com only)
00400005 = Austria: Special education school (lower secondary)
03800005 = Italy: Vocational training, Vocational Schools of Bolzano and Trento Provinces
01910005 = Croatia: Vocational programmes for crafts
00320005 = Argentina: General programme - Lower secondary
04420005 = Luxembourg: A 4-year technical education
02030005 = Czech Republic: Voc/tech secondary school with maturate
04840005 = Mexico: General Baccalaureate or Upper Secondary
07050005 = Slovenia: Vocational education programmes of short duration
02460005 = Finland: Double or triple examination, upper secondary school
00560005 = Belgium: second and third stage regular secondary education
07560005 = Switzerland: Vocational education, dual system 3-4 years
02760005 = Germany: Upper secondary level of education
03760005 = Israel: 4 years Higher education, grades 9-12
00080005 = Albania: Secondary education for adults(upper)
05280005 = Netherlands: admission to ISCED 3 MBO tertiary level,
03480005 = Hungary: Grammar school 3 (8 years long)
08580005 = Uruguay: Lower secondary in Rural Primary Schools
08261005 = United Kingdom (excl.Scotland): Students studying mostly for AS or A Levels or eq. non-voc. lev.3 qual.
08262005 = Scotland: I am not studying for any of these qualifications yet
00400015 = Austria: Higher technical and vocational college
00560015 = Belgium: second and third degrees of general education (Fr/Ger)
02760015 = Germany: Lower secondary without access to upper secondary, providing an extensive general education (grades 5 - 10)
00560025 = Belgium: Vocational Education (Germ Com only)
00400006 = Austria: Special education school (upper secondary)
01910006 = Croatia: Lower qualification vocational programmes
00320006 = Argentina: General programme - 4th to 6th year -Upper secondary- only for Province of Córdoba - New Structure
04420006 = Luxembourg: A 4 to 5-year technical, commercial or social education
07920006 = Turkey: Anatolian Teacher Training High School
02030006 = Czech Republic: Conservatory (upper secondary)
07030006 = Slovak Republic: Secondary College - branch/class with a school leaving examination
04840006 = Mexico: General Baccalaureate or Upper Secondary
00560006 = Belgium: second and third stage technical secondary education
02760006 = Germany: Lower secondary with access to upper secondary (comprehensive)
03760006 = Israel: 6 years Higher education, grades 7-12
05280006 = Netherlands: HAVO: advanced general secondary education/ admission to higher voc./ college, so tertiary level (ISCED2)
03480006 = Hungary: Grammar school 3 (8 years long)
08261006 = United Kingdom (excl.Scotland): Students studying mostly towards level 1 or 2 vocational qualifications
00400016 = Austria: Higher technical and vocational college
00560016 = Belgium: second and third degrees of technical or artistical education (transition) (Fr/Ger)
02760016 = Germany: Lower secondary with access to upper secondary (comprehensive)
00400007 = Austria: Academic secondary school lower level
01910007 = Croatia: Primary school - lower secondary education
00320007 = Argentina: Vocational programme - Lower secondary
07920007 = Turkey: Fine Arts and Sports High School
02030007 = Czech Republic: Voc/tech secondary school without maturate
07030007 = Slovak Republic: Secondary College - branch/class without a school leaving examination
04840007 = Mexico: Technical Baccalaureate or Technical from Upper Secondary
00560007 = Belgium: second and third stage artistic secondary education
07560007 = Switzerland: Basic vocational education, dual system 1-2 years
02760007 = Germany: Upper secondary level of education
03760007 = Israel: 6 years Higher education, grades 7-12
05280007 = Netherlands: HAVO: advanced general secondary education/ admission to higher voc./ college, so tertiary level (ISCED3)
08261007 = United Kingdom (excl.Scotland): Students studying mostly for level 3 vocational qualifications
00560017 = Belgium: second and third degrees of technical or artistical education (qualification) (Fr/Ger)
02760017 = Germany: Upper secondary level of education
00400008 = Austria: Academic secondary school upper level
00320008 = Argentina: Vocational programme - Upper secondary
04420008 = Luxembourg: Lower secondary private, not subsidized
00560008 = Belgium: second and third stage vocational secondary education
02760008 = Germany: Lower secondary without access to upper secondary, providing a basic general education (grades 5 -10)
03760008 = Israel: Primary education-ultra orthodox, grades 1-8
05280008 = Netherlands: VWO: admission to university (ISCED2)
08261008 = United Kingdom (excl.Scotland): Students studying mostly toward Entry Level Certificates
00560018 = Belgium: second and third degrees of vocational education (Fr/Ger)
02760018 = Germany: Pre-vocational training year upper secondary level
00320009 = Argentina: General programme - Lower secondary
04420009 = Luxembourg: Upper secondary private, not subsidized
07920009 = Turkey: Anatolian Vocational High School
02030009 = Czech Republic: Secondary special schools - practical schools, vocational education predominantly
00560009 = Belgium: Part-time vocational secondary education focused on the labour market
02760009 = Germany: Lower secondary with or w/o access to upper secondary, providing an extemsive general education (grades 5 - 10)
03760009 = Israel: Ultra Orthodox- Higher education- Boys
05280009 = Netherlands: VWO: admission to university (ISCED3)
08261009 = United Kingdom (excl.Scotland): Students below Year 10 - England
00560019 = Belgium: Vocational training focused on the labour market (Fr Com only)
02760019 = Germany: Vocational school upper secondary level

Family Structure
1 = Single parent (natural or otherwise)
2 = Two parents (natural or otherwise)
3 = Other
7 = N/A
8 = Invalid
9 = Missing

Educational level of father (ISCED)
0 = None
1 = ISCED 1
2 = ISCED 2
3 = ISCED 3B, C
4 = ISCED 3A, ISCED 4
5 = ISCED 5B
6 = ISCED 5A, 6
7 = N/A
8 = Invalid
9 = Missing

Immigration status
1 = Native
2 = Second-Generation
3 = First-Generation
7 = N/A
8 = Invalid
9 = Missing

ISCED designation
1 = A
2 = B
3 = C
4 = M
7 = N/A
8 = Invalid
9 = Missing

ISCED level
1 = ISCED level 1
2 = ISCED level 2
3 = ISCED level 3
7 = N/A
8 = Invalid
9 = Missing

ISCED orientation
1 = General
2 = Pre-Vocational
3 = Vocational
4 = Modular
7 = N/A
8 = Invalid
9 = Missing

Preference for Heritage Language in Conversations with Family and Friends
7 = N/A
9 = Missing

Language at home (3-digit code)
602 = Minority languages and Bulgarian dialects (BGR)
622 = Serbian of a yekavian variant or Montenegrin
627 = Other National dialects or languages (ROU)
639 = Other former Yugoslavian languages (SVN)

ISCO-08 Occupation code - Mother
6000 = Skilled agricultural, forestry and fishery workers
8000 = Plant and machine operators, and assemblers
1100 = Chief executives, senior officials and legislators
3100 = Science and engineering associate professionals
7100 = Building and related trades workers, excluding electricians
6200 = Market-oriented skilled forestry, fishery and hunting workers
7200 = Metal, machinery and related trades workers
9200 = Agricultural, forestry and fishery labourers
1300 = Production and specialised services managers
3300 = Business and administration associate professionals
6300 = Subsistence farmers, fishers, hunters and gatherers
9300 = Labourers in mining, construction, manufacturing and transport
1400 = Hospitality, retail and other services managers
3400 = Legal, social, cultural and related associate professionals
7400 = Electrical and electronic trades workers
2500 = Information and communications technology professionals
7500 = Food processing, wood working, garment and other craft and related trades workers
9500 = Street and related sales and service workers
2600 = Legal, social and cultural professionals
9600 = Refuse workers and other elementary workers
2110 = Physical and earth science professionals
3110 = Physical and engineering science technicians
5110 = Travel attendants, conductors and guides
7110 = Building frame and related trades workers
8110 = Mining and mineral processing plant operators
9110 = Domestic, hotel and office cleaners and helpers
1210 = Business services and administration managers
4210 = Tellers, money collectors and related clerks
7210 = Sheet and structural metal workers, moulders and welders, and related workers
9210 = Agricultural, forestry and fishery labourers
1310 = Production managers in agriculture, forestry and fisheries
2310 = University and higher education teachers
3310 = Financial and mathematical associate professionals
8310 = Locomotive engine drivers and related workers
3410 = Legal, social and religious associate professionals
7410 = Electrical equipment installers and repairers
2510 = Software and applications developers and analysts
3510 = Information and communications technology operations and user support technicians
7510 = Food processing and related trades workers
3120 = Mining, manufacturing and construction supervisors
7120 = Building finishers and related trades workers
8120 = Metal processing and finishing plant operators
9120 = Vehicle, window, laundry and other hand cleaning workers
1220 = Sales, marketing and development managers
3220 = Nursing and midwifery associate professionals
7220 = Blacksmiths, toolmakers and related trades workers
1320 = Manufacturing, mining, construction, and distribution managers
5320 = Personal care workers in health services
7420 = Electronics and telecommunications installers and repairers
7520 = Wood treaters, cabinet-makers and related trades workers
7130 = Painters, building structure cleaners and related trades workers
8130 = Chemical and photographic products plant and machine operators
2230 = Traditional and complementary medicine professionals
3230 = Traditional and complementary medicine associate professionals
1330 = Information and communications technology service managers
6330 = Subsistence mixed crop and livestock farmers
2430 = Sales, marketing and public relations professionals
3430 = Artistic, cultural and culinary associate professionals
3140 = Life science technicians and related associate professionals
5140 = Hairdressers, beauticians and related workers
8140 = Rubber, plastic and paper products machine operators
2340 = Primary school and early childhood teachers
6340 = Subsistence fishers, hunters, trappers and gatherers
3150 = Ship and aircraft controllers and technicians
8150 = Textile, fur and leather products machine operators
2160 = Architects, planners, surveyors and designers
8160 = Food and related products machine operators
8170 = Wood processing and papermaking plant operators
8180 = Other stationary plant and machine operators
3111 = Chemical and physical science technicians
3211 = Medical imaging and therapeutic equipment technicians
1311 = Agricultural and forestry production managers
3311 = Securities and finance dealers and brokers
3511 = Information and communications technology operations technicians
7511 = Butchers, fishmongers and related food preparers
7221 = Blacksmiths, hammersmiths and forging press workers
9621 = Messengers, package deliverers and luggage porters
2131 = Biologists, botanists, zoologists and related professionals
8131 = Chemical products plant and machine operators
1431 = Sports, recreation and cultural centre managers
7531 = Tailors, dressmakers, furriers and hatters
3141 = Life science technicians (excluding medical)
8341 = Mobile farm and forestry plant operators
5151 = Cleaning and housekeeping supervisors in offices, hotels and other establishments
8151 = Fibre preparing, spinning and winding machine operators
5161 = Astrologers, fortune-tellers and related workers
8112 = Mineral and stone processing plant operators
9112 = Cleaners and helpers in offices, hotels and other establishments
3212 = Medical and pathology Labouratory technicians
4212 = Bookmakers, croupiers and related gaming workers
8212 = Electrical and electronic equipment assemblers
1312 = Aquaculture and fisheries production managers
4312 = Statistical, finance and insurance clerks
8312 = Railway brake, signal and switch operators
3512 = Information and communications technology user support technicians
7512 = Bakers, pastry-cooks and confectionery makers
8122 = Metal finishing, plating and coating machine operators
1222 = Advertising and public relations managers
6222 = Inland and coastal waters fishery workers
3422 = Sports coaches, instructors and officials
7422 = Information and communications technology installers and servicers
2622 = Librarians and related information professionals
2132 = Farming, forestry and fisheries advisers
3132 = Incinerator and water treatment plant operators
9332 = Drivers of animal-drawn vehicles and machinery
7532 = Garment and related pattern-makers and cutters
2632 = Sociologists, anthropologists and related professionals
3252 = Medical records and health information technicians
9703 = Social beneficiary (unemployed, retired, sickness, etc.)
6113 = Gardeners, horticultural and nursery growers
7113 = Stonemasons, stone cutters, splitters and carvers
8113 = Well drillers and borers and related workers
4413 = Coding, proof-reading and related clerks
7413 = Electrical line installers and repairers
3513 = Computer network and systems technicians
7223 = Metal working machine tool setters and operators
3423 = Fitness and recreation instructors and program leaders
7523 = Woodworking-machine tool setters and operators
9623 = Meter readers and vending-machine collectors
7233 = Agricultural and industrial machinery mechanics and repairers
2433 = Technical and medical sales professionals (excluding ICT)
2633 = Philosophers, historians and political scientists
8343 = Crane, hoist and related plant operators
7543 = Product graders and testers (excluding foods and beverages)
2643 = Translators, interpreters and other linguists
3153 = Aircraft pilots and related associate professionals
2263 = Environmental and occupational health and hygiene professionals
8183 = Packing, bottling and labelling machine operators
1114 = Senior officials of special-interest organizations
7114 = Concrete placers, concrete finishers and related workers
8114 = Cement, stone and other mineral products machine operators
3214 = Medical and dental prosthetic technicians
3314 = Statistical, mathematical and related associate professionals
7224 = Metal polishers, wheel grinders and tool sharpeners
1324 = Supply, distribution and related managers
2424 = Training and staff development professionals
3134 = Petroleum and natural gas refining plant operators
3334 = Real estate agents and property managers
2434 = Information and communications technology sales professionals
7544 = Fumigators and other pest and weed controllers
8154 = Bleaching, dyeing and fabric cleaning machine operators
2654 = Film, stage and related directors and producers
9705 = Vague(a good job, a quiet job, a well paid job, an office job)
7315 = Glass makers, cutters, grinders and finishers
3435 = Other artistic and cultural associate professionals
2635 = Social work and counselling professionals
3155 = Air traffic safety electronics technicians
8155 = Fur and leather preparing machine operators
7316 = Sign writers, decorative painters, engravers and etchers
7516 = Tobacco preparers and tobacco products makers
2146 = Mining engineers, metallurgists and related professionals
1346 = Financial and insurance services branch managers
8156 = Shoemaking and related machine operators
2656 = Announcers on radio, television and other media
7317 = Handicraft workers in wood, basketry and related materials
7127 = Air conditioning and refrigeration mechanics
3257 = Environmental and occupational health inspectors and associates
7318 = Handicraft workers in textile, leather and related materials
3119 = Physical and engineering science technicians not elsewhere classified
7119 = Building frame and related trades workers not elsewhere classified
1219 = Business services and administration managers not elsewhere classified
7319 = Handicraft workers not elsewhere classified
4419 = Clerical support workers not elsewhere classified
5419 = Protective services workers not elsewhere classified
2519 = Software and applications developers and analysts not elsewhere classified
2619 = Legal professionals not elsewhere classified
6129 = Animal producers not elsewhere classified
4229 = Client information workers not elsewhere classified
5329 = Personal care workers in health services not elsewhere classified
9329 = Manufacturing labourers not elsewhere classified
2529 = Database and network professionals not elsewhere classified
9629 = Elementary workers not elsewhere classified
3139 = Process control technicians not elsewhere classified
3339 = Business services agents not elsewhere classified
1439 = Services managers not elsewhere classified
2149 = Engineering professionals not elsewhere classified
1349 = Professional services managers not elsewhere classified
7549 = Craft and related workers not elsewhere classified
8159 = Textile, fur and leather products machine operators not elsewhere classified
3259 = Health associate professionals not elsewhere classified
2359 = Teaching professionals not elsewhere classified
3359 = Regulatory government associate professionals not elsewhere classified
2659 = Creative and performing artists not elsewhere classified
5169 = Personal services workers not elsewhere classified
2269 = Health professionals not elsewhere classified
8189 = Stationary plant and machine operators not elsewhere classified

Highest parental education in years
9999 = Missing

Grade Repetition
0 = Did not repeat a <grade>
1 = Repeated a <grade>
9 = Missing

RANDOMLY ASSIGNED VARIANCE UNIT
7 = N/A
8 = Invalid
9 = Missing