*COUNTRY ID*
99999 = OMITTED

*CLASS ID*
999999 = OMITTED

*SCHOOL ID*
9999 = OMITTED

EXPECTED FURTHER EDUCATION
1 = <ISCED 5A OR 6>
2 = <ISCED 4 OR 5B>
3 = <ISCED 3>
4 = <ISCED 2>
5 = NOT EXPECT <ISCED 2>
7 = INVALID
9 = OMITTED

COUNTRY OF BIRTH-STUDENT
0 = OTHER
1 = COUNTRY OF BIRTH IS COUNTRY OF TEST
7 = INVALID
9 = OMITTED

LANGUAGE BACKGROUND
0 = OTHER
1 = LANGUAGE AT HOME IS LANGUAGE OF TEST
7 = INVALID
9 = OMITTED

HIGHEST LEVEL OF EDUCATION MOTHER
1 = <ISCED 5A OR 6>
2 = <ISCED 4 OR 5B>
3 = <ISCED 3>
4 = <ISCED 2>
5 = <ISCED 1>
6 = DID NOT COMPLETE <ISCED 1>
97 = INVALID
99 = OMITTED

INTEREST-MOTHER
1 = VERY INTERESTED
2 = QUITE INTERESTED
3 = NOT VERY INTERESTED
4 = NOT INTERESTED AT ALL
7 = INVALID
9 = OMITTED

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
97 = INVALID
99 = OMITTED

LIVING AT HOME-MOTHER
1 = YES
2 = NO
7 = INVALID
9 = OMITTED

ACTIVITIES-TELEVISION VIDEOS OR DVDS
1 = NO TIME
2 = LESS THAN 30 MINUTES
3 = ABOUT 30-60 MINUTES
4 = ABOUT 1-2 HOURS
5 = MORE THAN 2 HOURS
7 = INVALID
9 = OMITTED

ACTIVITIES-TALKING WITH PARENTS-ISSUES
1 = NEVER OR HARDLY EVER
2 = MONTHLY (AT LEAST ONCE A MONTH)
3 = WEEKLY (AT LEAST ONCE A WEEK)
4 = DAILY OR ALMOST DAILY
7 = INVALID
9 = OMITTED

PARTICIPATION-YOUTH ORGANISATION
1 = YES, WITHIN THE LAST 12 MONTHS
2 = YES, MORE THAN A YEAR AGO
3 = NO, I HAVE NEVER DONE THIS
7 = INVALID
9 = OMITTED

REGULAR LESSON-DISAGREE OPENLY
1 = NEVER
2 = RARELY
3 = SOMETIMES
4 = OFTEN
7 = INVALID
9 = OMITTED

OPINION-WAY CLASSES ARE TAUGHT
1 = TO A LARGE EXTENT
2 = TO A MODERATE EXTENT
3 = TO A SMALL EXTENT
4 = NOT AT ALL
7 = INVALID
9 = OMITTED

AGREE-TEACHERS TREAT FAIRLY
1 = STRONGLY AGREE
2 = AGREE
3 = DISAGREE
4 = STRONGLY DISAGREE
7 = INVALID
9 = OMITTED

GOOD CITIZEN-VOTING IN EVERY ELECTION
1 = VERY IMPORTANT
2 = QUITE IMPORTANT
3 = NOT VERY IMPORTANT
4 = NOT IMPORTANT AT ALL
7 = INVALID
9 = OMITTED

TRUST INSTITUTIONS-NATIONAL GOVERNMENT
1 = COMPLETEY
2 = QUITE A LOT
3 = A LITTLE
4 = NOT AT ALL
7 = INVALID
9 = OMITTED

EXTENT-IN FAVOUR OF PARTY
1 = A LOT
2 = TO SOME EXTENT
3 = A LITTLE
5 = LOGICALLY NOT APPLICABLE
7 = INVALID
9 = OMITTED

HOW WELL-DISCUSSING NEWSPAPER ARTICLE
1 = VERY WELL
2 = FAIRLY WELL
3 = NOT VERY WELL
4 = NOT AT ALL
7 = INVALID
9 = OMITTED

PROTEST-WRITE LETTER TO NEWSPAPER
1 = I WOULD CERTAINLY DO THIS
2 = I WOULD PROBABLY DO THIS
3 = I WOULD PROBABLY NOT DO THIS
4 = I WOULD CERTAINLY NOT DO THIS
7 = INVALID
9 = OMITTED

ADULT-VOTE IN <LOCAL ELECTIONS>
1 = I WILL CERTAINLY DO THIS
2 = I WILL PROBABLY DO THIS
3 = I WILL PROBABLY NOT DO THIS
4 = I WILL CERTAINLY NOT DO THIS
7 = INVALID
9 = OMITTED

RELIGIOUS BACKGROUND
0 = NO RELIGION
1 = RELIGION
7 = INVALID
9 = OMITTED

RELIGIOUS PRACTICES
1 = NEVER
2 = LESS THAN ONCE A YEAR
3 = AT LEAST ONCE A YEAR
4 = AT LEAST ONCE A MONTH
5 = AT LEAST ONCE A WEEK
7 = INVALID
9 = OMITTED

*STUDENT'S ETHNIC BACKGROUND*
4001 = AUT - QUESTION NOT ADMINISTERED OR DATA NOT AVAILABLE
10001 = BGR - QUESTION NOT ADMINISTERED OR DATA NOT AVAILABLE
15202 = CHL - CHILEAN NATIVES (AYMARA, RAPA NUI, QUECHUA, MAPUCHE, PEHUENCHE, ATACAMEÑO, COLLA, KAWÉSQAR, YÁMANA, DIAGUITA)
19604 = CYP - TURKISH CYPRIOT / MARONITE / ARMENIAN / LATIN
19607 = CYP - EUROPEAN COUNTRY (EXCLUDED FROM CYPRUS AND GREECE)
20301 = CZE - QUESTION NOT ADMINISTERED OR DATA NOT AVAILABLE
20801 = DNK - QUESTION NOT ADMINISTERED OR DATA NOT AVAILABLE
24601 = FIN - FINNISH SPEAKING WITH FINNISH ORIGIN
34401 = HKG - QUESTION NOT ADMINISTERED OR DATA NOT AVAILABLE
36001 = IDN - QUESTION NOT ADMINISTERED OR DATA NOT AVAILABLE
37201 = IRL - QUESTION NOT ADMINISTERED OR DATA NOT AVAILABLE
38001 = ITA - QUESTION NOT ADMINISTERED OR DATA NOT AVAILABLE
41001 = KOR - QUESTION NOT ADMINISTERED OR DATA NOT AVAILABLE
43801 = LIE - QUESTION NOT ADMINISTERED OR DATA NOT AVAILABLE
44001 = LTU - QUESTION NOT ADMINISTERED OR DATA NOT AVAILABLE
44207 = LUX - OTHER COUNTRY FROM THE EUROPEAN UNION
47001 = MLT - QUESTION NOT ADMINISTERED OR DATA NOT AVAILABLE
48401 = MEX - QUESTION NOT ADMINISTERED OR DATA NOT AVAILABLE
57801 = NOR - QUESTION NOT ADMINISTERED OR DATA NOT AVAILABLE
61601 = POL - QUESTION NOT ADMINISTERED OR DATA NOT AVAILABLE
64301 = RUS - QUESTION NOT ADMINISTERED OR DATA NOT AVAILABLE
70301 = SVK - QUESTION NOT ADMINISTERED OR DATA NOT AVAILABLE
72401 = ESP - QUESTION NOT ADMINISTERED OR DATA NOT AVAILABLE
75201 = SWE - QUESTION NOT ADMINISTERED OR DATA NOT AVAILABLE
75601 = CHE - QUESTION NOT ADMINISTERED OR DATA NOT AVAILABLE
92607 = ENG - MIXED ETHNIC ORIGIN (E.G. ASIAN FATHER, WHITE MOTHER)

*STUDENT'S COUNTRY OF BIRTH*
15802 = TWN - CHINA (INCLUDING HONG KONG AND MACAU)
17003 = COL - COUNTRY FROM ANOTHER CONTINENT THAN LATINAMERICA
20802 = DNK - ANOTHER NORDIC COUNTRY (NORWAY, SWEDEN, ICELAND, FINLAND)
20803 = DNK - ANOTHER COUNTRY IN EUROPE (FOR EXAMPLE ENGLAND, POLAND, GERMANY, SPAIN, TURKEY)
20804 = DNK - A COUNTRY FROM ANOTHER CONTINENT (FOR EXAMPLE IRAN, IRAQ, PAKISTAN, SOMALIA, CHILE, CHINA)
23303 = EST - SOME OTHER COUNTRIES IN THE FORMER SOVIET UNION
36002 = IDN - SOUTH EAST ASIAN COUNTRY INCLUDING TERMASUK IND, MYS, PHL, LAO, MMR, THA, KHM, BRN, SGP, VNM
43807 = LIE - EX-YUGOSLAVIA (BIH, HRV,MKD, MRB, SRB, SVN, KOSOVO)
48404 = MEX - ANOTHER COUNTRY FROM A CONTINENT OTHER THAN AMERICA
52808 = NLD - ANOTHER EUROPEAN COUNTRY (FOR EXAMPLE GERMANY, CROATIA, SERBIA ETC.)
52809 = NLD - ANOTHER NON-EUROPEAN COUNTRY (FOR EXAMPLE IRAQ, AUSTRALIA, BOLIVIA ETC.)
57802 = NOR - ANOTHER NORDIC COUNTRY (SWEDEN, DENMARK, FINLAND, ICELAND)
61602 = POL - IN FORMER SOVIET UNION OR AN EUROPEAN, FORMER COMMUNIST COUNTRY
70502 = SVN - SOME OTHER REPUBLIC OF FORMER STATE OF YUGOSLAVIA
75203 = SWE - EUROPEAN COUNTRY (EXCLUDING THE NORDIC COUNTRIES)
75607 = CHE - EX-YUGOSLAVIA (BIH, HRV,MKD, MRB, SRB, SVN, KOSOVO)
92602 = ENG - IRELAND, NORTHERN IRELAND, SCOTLAND OR WALES
95602 = BFL - ANOTHER WEST EUROPEAN COUNTRY (E.G. THE NETHERLANDS, ITALY, ETC.)
95603 = BFL - AN EAST EUROPEAN COUNTRY (E.G. POLAND, SERBIA, ETC.)
95604 = BFL - A NON-EUROPEAN COUNTRY (E.G. TURKEY, MOROCCO, CONGO, ETC.)

*LANGUAGE USE AT HOME*
20802 = DNK - ANOTHER NORDIC LANGUAGE (NORWEGIAN, SWEDISH, ICELANDIC, FINNISH)
20803 = DNK - ANOTHER EUROPEAN LANGUAGE (FOR EXAMPLE ENGLISH, POLISH, GERMAN, SPANISH, TURKISH)
20804 = DNK - A LANGUAGE FROM ANOTHER CONTINENT (FOR EXAMPLE AN ASIAN OR AFRICAN LANGUAGE)
37203 = IRL - ANOTHER EUROPEAN LANGUAGE (E.G. POLISH, FRENCH)
37204 = IRL - A NON-EUROPEAN LANGUAGE (E.G. ARABIC, MANDARIN)
43807 = LIE - SOUTH SLAVIC (BOSNIAN, CROATIAN, MACEDONIAN, SERBIAN, SLOVENIAN)
44206 = LUX - BOSNIAN, CROATIAN, SERBIAN, SERBO-CROATIAN
52807 = NLD - BAHASA INDONESIA OR MOLUCCAN MALAY
52809 = NLD - ANOTHER EUROPEAN LANGUAGE (FOR EXAMPLE GERMAN, SERVO-CROATIAN ETC.)
52810 = NLD - ANOTHER NON-EUROPEAN LANGUAGE (FOR EXAMPLE THAI, SOUTH-AFRICAN ETC.)
57803 = NOR - ANOTHER EUROPEAN LANGUAGE (E.G., ENGLISH, FRENCH OR POLISH)
57804 = NOR - A DIFFERENT LANGUAGE (E.G., URDU, VIETNAMESE OR SOMALI)
64302 = RUS - LANGUAGE OF OTHER PEOPLES AND ETHNIC GROUPS
64303 = RUS - LANGUAGE FROM ANOTHER COUNTRY OF CIS
64304 = RUS - ANOTHER LANGUAGE FROM ANOTHER PART OF THE WORLD
70504 = SVN - LANGUAGES OF OTHER REPUBLICS OF YOUGOSLAVIA (CROATIAN, SERBIAN, MACEDONIAN)
75607 = CHE - SOUTH SLAV (BOSNIAN, CROATIAN, MACEDONIAN, SERBIAN, SLOVENIAN)
92602 = ENG - ANOTHER EUROPEAN LANGUAGE (E.G. ITALIAN, POLISH, WELSH)
92603 = ENG - A NON-EUROPEAN LANGUAGE (E.G. ARABIC, MANDARIN, PUNJABI, URDU)

*STUDENT'S RELIGION*
23301 = EST - QUESTION NOT ADMINISTERED OR DATA NOT AVAILABLE
24601 = FIN - QUESTION NOT ADMINISTERED OR DATA NOT AVAILABLE
37202 = IRL - PROTESTANT (E.G., CHURCH OF IRELAND, PRESBYTERIAN)
37203 = IRL - ANOTHER CHRISTIAN RELIGION (E.G., ORTHODOX)
37204 = IRL - A NON-CHRISTIAN RELIGION (E.G., MUSLIM, JEWISH, HINDU)
38001 = ITA - QUESTION NOT ADMINISTERED OR DATA NOT AVAILABLE
43803 = LIE - PROTESTANT, REFORMED BRANCH OF PROTESTANTISM
48401 = MEX - QUESTION NOT ADMINISTERED OR DATA NOT AVAILABLE
55401 = NZL - QUESTION NOT ADMINISTERED OR DATA NOT AVAILABLE
70501 = SVN - QUESTION NOT ADMINISTERED OR DATA NOT AVAILABLE
72401 = ESP - QUESTION NOT ADMINISTERED OR DATA NOT AVAILABLE
75201 = SWE - QUESTION NOT ADMINISTERED OR DATA NOT AVAILABLE
75603 = CHE - PROTESTANT / REFORMED BRANCH OF PROTESTANTISM

*FINAL PARTICIPATION INDICATOR*
0 = STD EXCL, DID NOT PARTICIPATE
1 = STD LEFT SCHOOL
2 = STD ABSENT (BOTH ACH AND QUEST)
3 = STD PARTICIPATED (EITHER ACH OR QUEST)
4 = PAR PERM DENIED
5 = STD EXCL, BUT DATA AVAILABLE
9 = OMITTED

*POPULATION ID*
2 = ICCS TARGET GRADE
3 = ICCS ADDITIONAL GRADE
9 = OMITTED

*EXPLICIT STRATUM CODE*
99 = OMITTED

*IN ICCS 2009*
0 = NOT IN ICCS 2009 INT. SAMPLE
1 = IN ICCS 2009 INT. SAMPLE
9 = OMITTED

*JACKKNIFE REPLICATE CODE-STUDENT STUDY*
9 = OMITTED

*GRADE ID*
7 = GRADE 7
8 = GRADE 8
9 = GRADE 9
10 = GRADE 10
99 = OMITTED

10001 = BGR - GENERAL ISCED 2 - JUNIOR HIGH SCHOOL
10002 = BGR - GENERAL NON-PROFILED ISCED3 - NON-PROFILED HIGH SCHOOL
10003 = BGR - GENERAL PROFILED ISCED3 - PROFILED HIGH SCHOOL
10004 = BGR - VOCATIONAL ISCED3 - VOCATIONAL HIGH SCHOOL
15801 = TWN - SPECIAL EDUCATION CLASS
15802 = TWN - REGULAR CLASS
15803 = TWN - TALENTED CLASS
43801 = LIE - SCHOOL TYPE WITH BASIC REQUIREMENTS
43802 = LIE - SCHOOL TYPE WITH ADVANCED REQUIREMENTS
43803 = LIE - SCHOOL TYPE WITH HIGH REQUIREMENTS
43804 = LIE - SCHOOL TYPE WITHOUT SELECTION
43805 = LIE - OTHER SCHOOL TYPE
44201 = LUX - SECONDARY TECHNICAL EDUCATION – 8TH GRADE MODULAR EDUCATION
44202 = LUX - SECONDARY TECHNICAL EDUCATION – 8TH GRADE
44203 = LUX - GENERAL SECONDARY EDUCATION – VIE
52800 = NLD - NO STREAM AVAILABLE / NOT KNOWN
52801 = NLD - PRO
52802 = NLD - VBMO BBL
52803 = NLD - VMBO KBL
52804 = NLD - VMBO GL-TL
52805 = NLD - VMBO GENERAL
52806 = NLD - VMBO-HAVO
52807 = NLD - HAVO
52808 = NLD - VWO-ATH
52809 = NLD - HAVO-VWO
52810 = NLD - GYMNASIUM
52811 = NLD - OTHER (COMBINATION OF STREAMS)
64301 = RUS - CLASS OF CORRECTION
64302 = RUS - CLASS WITH GENERAL EDUCATION PROGRAMMES
64303 = RUS - CLASS WITH SPECIAL TRACKS ON CCE AND LOW
75601 = CHE - SCHOOL TYPE WITH BASIC REQUIREMENTS
75602 = CHE - SCHOOL TYPE WITH ADVANCED REQUIREMENTS
75603 = CHE - SCHOOL TYPE WITH HIGH REQUIREMENTS
75604 = CHE - SCHOOL TYPE WITHOUT SELECTION
75605 = CHE - OTHER SCHOOL TYPE
95601 = BFL - GENERAL EDUCATION
95602 = BFL - PRE-VOCATIONAL EDUCATION
99999 = OMITTED

*FILE CREATION DATE AT DPC HAMBURG*
99999999 = OMITTED

*INDICATOR FOR EXCLUDED STUDENTS*
1 = STUDENTS WITH FUNCTIONAL DISABILITIES
2 = STUDENTS WITH INTELLECTUAL DISABILITIES
3 = NON-NATIVE LANGUAGE SPEAKERS
9 = OMITTED

*PARTICIPATION STATUS/ACH SESSION*
0 = STUDENT EXCLUDED AND NO BOOKLET ASSIGNED
1 = STUDENT LEFT SCHOOL PERMANENTLY
2 = STUDENT ABSENT IN SESSION
3 = STUDENT PARTICIPATED
4 = NO PARENTAL PERMISSION
5 = STUDENT PART BUT EXCL
9 = OMITTED

*PARTICIPATION STATUS/BG SESSION*
0 = STUDENT EXCLUDED AND NO QUEST ASSIGNED
1 = STUDENT LEFT SCHOOL PERMANENTLY
2 = STUDENT ABSENT IN SESSION
3 = STUDENT PARTICIPATED
4 = NO PARENTAL PERMISSION
5 = STUDENT PART BUT EXCL
9 = OMITTED

*TEST ADMINISTRATORS POSITION*
1 = NATIONAL CENTER STAFF
2 = TEACHER FROM SCHOOL, BUT NOT TEACHER OF
3 = OTHER
9 = OMITTED

*PARTICIPATION STATUS/RM SESSION*
0 = NO REGIONAL MODULE OR STUDENT EXCLUDED
1 = STUDENT LEFT SCHOOL PERMANENTLY
2 = STUDENT ABSENT IN SESSION
3 = STUDENT PARTICIPATED
4 = NO PARENTAL PERMISSION
5 = STUDENT PART BUT EXCL
9 = OMITTED

*PARTICIPATION INDICATOR REGIONAL MODULE
0 = NO PARTICIPATION IN REGIONAL MODULE
1 = PARTICIPATION IN EUROPEAN MODULE
2 = PARTICIPATION IN LATIN AMERICAN MODULE
3 = PARTICIPATION IN ASIAN MODULE
9 = OMITTED

*STUDENT PART OF RELIABILITY SAMPLE*
0 = NO PART OF RELIABILITY SAMPLE
1 = PART OF RELIABILITY SAMPLE
9 = OMITTED

*SUPPORT FOR POLITICAL PARTIES*
0 = NO SUPPORT
1 = A LITTLE
2 = TO SOME EXTENT
3 = A LOT
7 = INVALID
9 = OMITTED

*OCCUPATION CODE MOTHER*
9997 = INVALID
9999 = OMITTED

*AGE OF STUDENT*
97 = INVALID
99 = OMITTED

*GENDER OF STUDENT*
0 = BOY
1 = GIRL
7 = INVALID
9 = OMITTED

*EXPECTED EDUCATION*
0 = DON'T EXPECT TO COMPLETE <ISCED LEVEL 2>
1 = <ISCED LEVEL 2>
2 = <ISCED LEVEL 3>
3 = <ISCED LEVEL 4 OR 5B>
4 = <ISCED LEVEL 5A OR 6>
7 = INVALID
9 = OMITTED

*IMMIGRATION BACKGROUND*
1 = NATIVE STUDENTS
2 = FIRST-GENERATION STUDENTS
3 = NON-NATIVE STUDENTS
7 = INVALID
9 = OMITTED

*LANGUAGE USE AT HOME*
0 = OTHER LANGUAGE
1 = LANGUAGE OF TEST
7 = INVALID
9 = OMITTED

*MOTHER'S EDUCATIONAL LEVEL*
0 = SHE DID NOT COMPLETE <ISCED LEVEL 1>
1 = <ISCED LEVEL 1>
2 = <ISCED LEVEL 2>
3 = <ISCED LEVEL 3>
4 = <ISCED LEVEL 4 OR 5B>
5 = <ISCED LEVEL 5A OR 6>
7 = INVALID
9 = OMITTED

*FATHER'S EDUCATIONAL LEVEL*
0 = HE DID NOT COMPLETE <ISCED LEVEL 1>
1 = <ISCED LEVEL 1>
2 = <ISCED LEVEL 2>
3 = <ISCED LEVEL 3>
4 = <ISCED LEVEL 4 OR 5B>
5 = <ISCED LEVEL 5A OR 6>
7 = INVALID
9 = OMITTED

*MOTHER'S INTEREST IN POL AND SOC ISS*
0 = NOT INTERESTED AT ALL
1 = NOT VERY INTERESTED
2 = QUITE INTERESTED
3 = VERY INTERESTED
7 = INVALID
9 = OMITTED

*HOME LITERACY*
0 = 0-10 BOOKS
1 = 11-25 BOOKS
2 = 26-100 BOOKS
3 = 101-200 BOOKS
4 = 201-500 BOOKS
5 = MORE THAN 500 BOOKS
7 = INVALID
9 = OMITTED

*FAMILIY STRUCTURE*
1 = SINGLE PARENT FAMILY
2 = NUCLEAR FAMILY
3 = MIXED FAMILY
4 = OTHER
7 = INVALID
9 = OMITTED

*STUDENTS' PARTICIPATION IN REL SERVICE*
0 = NEVER
1 = LESS THAN ONCE A YEAR
2 = AT LEAST ONCE A YEAR
3 = AT LEAST ONCE A MONTH
4 = AT LEAST ONCE A WEEK
7 = INVALID
9 = OMITTED

HIGHEST PARENTAL EDUCATIONAL LEVEL
0 = DID NOT COMPLETE <ISCED LEVEL 1>
1 = <ISCED LEVEL 1>
2 = <ISCED LEVEL 2>
3 = <ISCED LEVEL 3>
4 = <ISCED LEVEL 4 OR 5B>
5 = <ISCED LEVEL 5A OR 6>
7 = INVALID
9 = OMITTED

CIVED CONTENT KNOWLEDGE SCALE - MLE
997 = INVALID
999 = OMITTED