Population ID
1 = Pop 1
2 = Pop 2
9 = Omitted or invalid

Standardized Grade ID
1 = Lower Grade
2 = Upper Grade
9 = Omitted or invalid

Grade ID
7 = Grade 7
8 = Grade 8
9 = Grade 9
99 = Omitted or invalid

Student Test Booklet
1 = Booklet 01
2 = Booklet 02
3 = Booklet 03
4 = Booklet 04
5 = Booklet 05
6 = Booklet 06
7 = Booklet 07
8 = Booklet 08
9 = Booklet 09
10 = Booklet 10
11 = Booklet 11
12 = Booklet 12
13 = Booklet 13
14 = Booklet 14
15 = Booklet 15
16 = Booklet 16
17 = Booklet 17
18 = Booklet 18
19 = Booklet 19
20 = Booklet 20
21 = Booklet 21
22 = Booklet 22
23 = Booklet 23
24 = Booklet 24
99 = Omitted or invalid

School ID
9999 = Omitted or invalid

Class ID
999999 = Omitted or invalid

Student ID
99999999 = Omitted or invalid

GEN\SEX OF STUDENT
1 = Girl
2 = Boy
9 = Omitted or invalid

GEN\DATE OF BIRTH\MONTH
1 = January
2 = February
3 = March
4 = April
5 = May
6 = June
7 = July
8 = August
9 = September
10 = October
11 = November
12 = December
99 = Omitted or invalid

GEN\DATE OF BIRTH\YEAR
1 = 2001
2 = 2002
3 = 2003
4 = 2004
5 = 2005
6 = 2006
7 = 2007
8 = 2008
9 = 2009
10 = Other
99 = Omitted or invalid

GEN\DATE OF BIRTH\YEAR
1 = 2000
2 = 2001
3 = 2002
4 = 2003
5 = 2004
6 = 2005
7 = 2006
8 = 2007
9 = 2008
10 = 2009
11 = Other
99 = Omitted

GEN\OFTEN SPEAK <LANG OF TEST> AT HOME
1 = Always
2 = Almost always
3 = Sometimes
4 = Never
9 = Omitted or invalid

GEN\AMOUNT OF BOOKS IN YOUR HOME
1 = None or very few (0–10 books)
2 = Enough to fill one shelf (11–25 books)
3 = Enough to fill one bookcase (26–100 books)
4 = Enough to fill two bookcases (101–200 books)
5 = Enough to fill three or more bookcases (more than 200)
9 = Omitted or invalid

GEN\HOME POSSESS\COMPUTER TABLET
1 = Yes
2 = No
9 = Omitted or invalid

GEN\HIGHEST LVL OF EDU OF <PARENT/GUARDIAN A>
1 = Some <Primary education—ISCED Level 1 or Lower secondary education—ISCED Level 2> or did not go to school
2 = <Lower secondary education—ISCED Level 2>
3 = <Upper secondary education—ISCED Level 3>
4 = <Post-secondary, non-tertiary education—ISCED Level 4>
5 = <Short-cycle tertiary education—ISCED Level 5>
6 = <Bachelor’s or equivalent level—ISCED Level 6>
7 = <Postgraduate degree: Master’s—ISCED Level 7 or Doctor —ISCED Level 8>
8 = I don’t know
9 = Not applicable
99 = Omitted or invalid

GEN\HOW FAR IN EDU DO YOU EXPECT TO GO
1 = Finish <Lower secondary education—ISCED Level 2>
2 = Finish <Upper secondary education—ISCED Level 3>
3 = Finish <Post-secondary, non-tertiary education—ISCED Level 4>
4 = Finish <Short-cycle tertiary education—ISCED Level 5>
5 = Finish <Bachelor’s or equivalent level—ISCED Level 6>
6 = Finish <Postgraduate degree: Master’s—ISCED Level 7 or Doctor —ISCED Level 8>
9 = Omitted or invalid

GEN\HIGHEST LVL OF EDU OF MOTHER OR FEMALE GUARDIAN
1 = Did not finish grade 9 or did not go to school
2 = Completed grade 9
3 = Completed Grade 12
4 = Completed post-matric certificate
5 = Completed diploma
6 = Completed First degree
7 = Completed honour's degree
8 = Completed Master's or Doctoral degree
9 = I don't know
10 = Not applicable
99 = Omitted

GEN\<PARENT/GUARDIAN A> BORN IN <COUNTRY>
1 = Yes
2 = No
3 = I don't know
4 = Not applicable
9 = Omitted or invalid

GEN\BORN IN <COUNTRY>\AGE CAME TO COUNTRY
1 = Older than 10 years old
2 = 5 to 10 years old
3 = Younger than 5 years old
6 = Logically not applicable
9 = Omitted or invalid

GEN\ABOUT HOW OFTEN ABSENT FROM SCHOOL
1 = Once a week
2 = Once every two weeks
3 = Once a month
4 = Once every two month
5 = Never or almost never
9 = Omitted or invalid

GEN\HOW OFTEN\TIRED
1 = Every day
2 = Almost every day
3 = Sometimes
4 = Never
9 = Omitted or invalid

GEN\AGREE\BEING IN SCHOOL
1 = Agree a lot
2 = Agree a little
3 = Disagree a little
4 = Disagree a lot
9 = Omitted or invalid

GEN\HOW OFTEN\SAID MEAN THINGS
1 = At least once a week
2 = Once or twice a month
3 = A few times a year
4 = Never
9 = Omitted or invalid

MATH\WORK ON YOUR OWN
1 = Every or almost every lesson
2 = About half the lessons
3 = Some lessons
4 = Never
9 = Omitted or invalid

MATH\HOW OFTEN TEACHER GIVE YOU HOMEWORK\MATHEMATICS
1 = Every day
2 = 3 or 4 times a week
3 = 1 or 2 times a week
4 = Less than once a week
5 = Never
9 = Omitted or invalid

MATH\HOW MANY MINUTES SPENT ON HOMEWORK\MATHEMATICS
1 = My teacher never gives me homework in…
2 = 1–15 minutes
3 = 16–30 minutes
4 = 31–60 minutes
5 = 61–90 minutes
6 = More than 90 minutes
9 = Omitted or invalid

MATH\EXTRA LESSONS LAST 12 MONTH\MATHEMATICS
1 = Yes, to excel in class
2 = Yes, to keep up in class
3 = No
9 = Omitted or invalid

MATH\EXTRA LESSONS HOW MANY MONTH\MATHEMATICS
1 = Did not attend
2 = Less than 4 months
3 = 4-8 months
4 = More than 8 months
9 = Omitted or invalid

BIO\HOW OFTEN CONDUCT EXPERIMENTS
1 = At least once a week
2 = Once or twice a month
3 = A few times a year
4 = Never
6 = Logically not applicable
9 = Omitted or invalid

BIO\AGREE\ENJOY LEARNING BIOLOGY
1 = Agree a lot
2 = Agree a little
3 = Disagree a little
4 = Disagree a lot
6 = Logically not applicable
9 = Omitted or invalid

GEN\LIKE TEST ON COMPUTER TABLET
1 = I liked it a lot
2 = I liked it a little
3 = I didn't like it very much
4 = I didn't like it at all
9 = Omitted or invalid

GEN\USE COMPUTER TABLET\HOW OFTEN\SCHOOL ASSIGNMENT
1 = Every or almost every day
2 = Once or twice a week
3 = Once or twice a month
4 = Never or almost never
9 = Omitted or invalid

GEN\KNOWLEDGE OF TERMS\WELL\WIFI
1 = Very well
2 = Well
3 = A little
4 = Not at all
9 = Omitted or invalid

Student Participation Status Indicator
0 = Student excluded and did not participate
1 = Student left school permanently
2 = Student absent
3 = Student participated
4 = Parental permission denied
5 = Student excluded, but data available
6 = Student removed from sample
7 = Booklet lost
99 = Omitted or invalid

Student Participation Achievement Session
0 = Student excluded and did not receive a booklet
1 = NA - left school permanently
2 = A - absent in session
3 = C - participated
4 = P - no parental permission
9 = Omitted or invalid

Sex of Students
1 = Female
2 = Male
9 = Omitted or invalid

Date of Student Birth\Month
99 = Omitted or invalid

Test Administrator Position
1 = National Center Staff
2 = Teacher from School
3 = Other
9 = Omitted or invalid

Special Accommodation\Achievement Session
0 = No Special Accommodation
1 = Special Accommodation
9 = Omitted or invalid

Student Exclusion Status
1 = Student with functional disabilities
2 = Student with intellectual disabilities
3 = Non-native language speaker
9 = Omitted or invalid

Reliability Coding Status
0 = Students Booklet not used for Reliability Scoring
1 = Students Booklet was used for Reliability Scoring
9 = Omitted or invalid

Conditioning Variable
9 = Omitted or invalid

ADMINISTRATION MODE/DATA SOURCE STUDENT TEST
1 = Paper
2 = Electronic
9 = Omitted or invalid

Locale ID of Student Achievement Test
1071 = Macedonian (Former Yugoslav Republic of Macedonia)
1132 = Sepedi (Sesotho sa Leboa) (South Africa)
3098 = Serbian (Cyrillic, Serbia and Montenegro)
7194 = Serbian (Cyrillic, Bosnia and Herzegovina)
51461 = Bosnian (Cyrillic) (Bosnia and Herzegovina)
71773 = English (South Africa - Western Cape Province)
107813 = Afrikaans (South Africa - Western Cape Province)

IMPLICIT STRATUM CODE
999 = Omitted or invalid

INTERN. MATH BENCH REACHED WITH 1ST PV
1 = Below 400
2 = At or above 400 but below 475
3 = At or above 475 but below 550
4 = At or above 550 but below 625
5 = At or above 625
9 = Omitted or invalid

Home Educational Resources/IDX
1 = Many Resources
2 = Some Resources
3 = Few Resources
9 = Omitted or invalid

Students Sense of School Belonging/IDX
1 = High Sense of School Belonging
2 = Some Sense of School Belonging
3 = Little Sense of School Belonging
9 = Omitted or invalid

Student Bullying/IDX
1 = Never or Almost Never
2 = About Monthly
3 = About Weekly
9 = Omitted or invalid

Students Like Learning Mathematics Lessons/IDX
1 = Very Much Like Learning Mathematics
2 = Somewhat Like Learning Mathematics
3 = Do Not Like Learning Mathematics
9 = Omitted or invalid

Instructional Clarity in Mathematics Lessons/IDX
1 = High Clarity of Instruction
2 = Moderate Clarity of Instruction
3 = Low Clarity of Instruction
9 = Omitted or invalid

Disorderly Behavior during Math Lessons/IDX
1 = Few or No Lessons
2 = Some Lessons
3 = Most Lessons
9 = Omitted or invalid

Student Confident in Mathematics/IDX
1 = Very Confident in Mathematics
2 = Somewhat Confident in Mathematics
3 = Not Confident in Mathematics
9 = Omitted or invalid

Students Value Mathematics/IDX
1 = Strongly Value Mathematics
2 = Somewhat Value Mathematics
3 = Do Not Value Mathematics
9 = Omitted or invalid

Students Like Learning Science/IDX
1 = Very Much Like Learning Science
2 = Somewhat Like Learning Science
3 = Do Not Like Learning Science
9 = Omitted or invalid

Student Confident in Science/IDX
1 = Very Confident in Science
2 = Somewhat Confident in Science
3 = Not Confident in Science
9 = Omitted or invalid

Students Value Science/IDX
1 = Strongly Value Science
2 = Somewhat Value Science
3 = Do Not Value Science
9 = Omitted or invalid

Students Like Learning Biology/IDX
1 = Very Much Like Learning Biology
2 = Somewhat Like Learning Biology
3 = Do Not Like Learning Biology
9 = Omitted or invalid

Student Confident in Biology/IDX
1 = Very Confident in Biology
2 = Somewhat Confident in Biology
3 = Not Confident in Biology
9 = Omitted or invalid

Students Like Learning Earth Science/IDX
1 = Very Much Like Learning Earth Science
2 = Somewhat Like Learning Earth Science
3 = Do Not Like Learning Earth Science
9 = Omitted or invalid

Student Confident in Earth Science/IDX
1 = Very Confident in Earth Science
2 = Somewhat Confident in Earth Science
3 = Not Confident in Earth Science
9 = Omitted or invalid

Students Like Learning Chemistry/IDX
1 = Very Much Like Learning Chemistry
2 = Somewhat Like Learning Chemistry
3 = Do Not Like Learning Chemistry
9 = Omitted or invalid

Student Confident in Chemistry/IDX
1 = Very Confident in Chemistry
2 = Somewhat Confident in Chemistry
3 = Not Confident in Chemistry
9 = Omitted or invalid

Students Like Learning Physics/IDX
1 = Very Much Like Learning Physics
2 = Somewhat Like Learning Physics
3 = Do Not Like Learning Physics
9 = Omitted or invalid

Students Confident in Physics/IDX
1 = Very Confident in Physics
2 = Somewhat Confident in Physics
3 = Not Confident in Physics
9 = Omitted or invalid

Number of Home Study Supports
0 = Neither Own Room nor Internet Connection
1 = Either Own Room or Internet Connection
2 = Both Own Room and Internet Connection
9 = Omitted or invalid

Parents' Highest Education Level
1 = University or Higher
2 = Post-secondary but not University
3 = Upper Secondary
4 = Lower Secondary
5 = Some Primary, Lower Secondary or No School
6 = Don't Know
9 = Omitted or invalid

GEN\TOTAL ENROLLMENT OF STUDENTS
99999 = Omitted or invalid

GEN\STUDENTS BACKGROUND\ECONOMIC DISADVA
1 = 0 to 10%
2 = 11 to 25%
3 = 26 to 50%
4 = More than 50%
9 = Omitted or invalid

GEN\PERCENT OF STUDENTS <LANG OF TEST>
1 = More than 90%
2 = 76 to 90%
3 = 51 to 75%
4 = 26 to 50%
5 = 25% or less
9 = Omitted or invalid

GEN\HOW MANY PEOPLE LIVE IN AREA
1 = More than 500,000 people
2 = 100,001 to 500,000 people
3 = 50,001 to 100,000 people
4 = 30,001 to 50,000 people
5 = 15,001 to 30,000 people
6 = 3,001 to 15,000 people
7 = 3,000 people or fewer
99 = Omitted or invalid

GEN\IMMEDIATE AREA OF SCH LOCATION
1 = Urban–Densely populated
2 = Suburban–On fringe or outskirts of urban area
3 = Medium size city or large town
4 = Small town or village
5 = Remote rural
9 = Omitted or invalid

GEN\INSTRUCTIONAL DAYS IN 1 CALENDER WEEK
1 = 6 days
2 = 5 1/2 days
3 = 5 days
4 = 4 1/2 days
5 = 4 days
6 = Other
9 = Omitted or invalid

GEN\BOOKS WITH DIFFERENT TITLES
1 = 2,000 books of fewer
2 = More than 2,000 books
6 = Logically not applicable
9 = Omitted or invalid

GEN\SHORTAGE\GEN\INSTRUCTIONAL MATERIAL
1 = Not at all
2 = A little
3 = Some
4 = A lot
9 = Omitted or invalid

GEN\SCH CHARACTER\TCH UNDERSTANDING
1 = Very high
2 = High
3 = Medium
4 = Low
5 = Very low
9 = Omitted or invalid

GEN\SHORTAGE\GEN\WORKING FLUSH TOILETS
1 = Not at all
2 = A little
3 = Some
4 = A lot
9 = Omitted

GEN\DEGREE PROBS\ARRIVING LATE AT SCHOOL
1 = Not a problem
2 = Minor problem
3 = Moderate problem
4 = Serious problem
9 = Omitted or invalid

GEN\HIGHEST LEVEL OF FORMAL EDUCATION
1 = Did not complete <Bachelor’s or equivalent level—ISCED Level 6>
2 = <Bachelor’s or equivalent level—ISCED Level 6>
3 = <Master’s or equivalent level—ISCED Level 7>
4 = <Doctor or equivalent level—ISCED Level 8>
9 = Omitted or invalid

GEN\HIGHEST LEVEL OF FORMAL EDUCATION
1 = Did not complete <Bachelor’s or equivalent level—ISCED Level 6>
2 = <Bachelor’s or equivalent level—ISCED Level 6>
3 = <Master’s or equivalent level—ISCED Level 7>
4 = or equivalent level—ISCED Level 7>
5 = <Doctor or equivalent level—ISCED Level 8>
9 = Omitted

School Participation Status Indicator
1 = Question not returned
2 = Question lost
3 = Question returned completed
6 = School removed from sample
9 = Omitted or invalid

ADMINISTRATION MODE/DATA SOURCE SCHOOL QUESTIONNAIRE
1 = Paper
2 = Online
9 = Omitted or invalid

School Discipline Problems-Prncpl/IDX
1 = Hardly Any Problems
2 = Minor Problems
3 = Moderate to Severe Problems
9 = Omitted or invalid

School Emph on Acad Success-Prncpl/IDX
1 = Very High Emphasis
2 = High Emphasis
3 = Medium Emphasis
9 = Omitted or invalid

Instr Aff by Mat Res Shortage-Prncpl/IDX
1 = Not Affected
2 = Affected
3 = Affected A Lot
9 = Omitted or invalid

School Composition by Socioeconomic Background
1 = More Affluent
2 = Neither More Affluent nor More Disadvantaged
3 = More Disadvantaged
9 = Omitted or invalid

School type/Public and Independent
1 = Public
2 = Independent

1 = Eastern Cape
2 = Free State
3 = Gauteng
4 = KwaZulu-Natal
5 = Limpopo
6 = Mpumalanga
7 = North West
8 = Northern Cape
9 = Western Cape

Quintile status of schools
1 = Quintile 1
2 = Quintile 2
3 = Quintile 3
4 = Quintile 4
5 = Quintile 5
6 = Independent Schools

1 = No-fee
2 = Fee-paying