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
3 = Grade 3
4 = Grade 4
5 = Grade 5
6 = Grade 6
10 = Grade 10
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 = PSI
16 = PSI
17 = Bridge Booklet 1
18 = Bridge Booklet 2
19 = Bridge Booklet 3
20 = Bridge Booklet 4
21 = Bridge Booklet 5
22 = Bridge Booklet 6
23 = Bridge Booklet 7
24 = Bridge Booklet 8
99 = Omitted or invalid

School ID
9999 = Omitted or invalid

Class ID
999999 = Omitted or invalid

Student ID
99999999 = 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
9 = Omitted or invalid

Teacher Link Number
99 = Omitted or invalid

Subject ID
1 = Mathematics
2 = Science
3 = Mathematics and Science
9 = Omitted or invalid

Subject Code in instrument
1 = Mathematics
6 = Integrated science
7 = Mathematics and science
9 = Omitted or invalid

Mathematics Teacher Link
9 = Omitted or invalid

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

GEN\SEX OF TEACHER
1 = Female
2 = Male
9 = Omitted or invalid

GEN\AGE OF TEACHER
1 = Under 25
2 = 25–29
3 = 30–39
4 = 40–49
5 = 50–59
6 = 60 or more
9 = Omitted or invalid

GEN\LEVEL OF FORMAL EDUCATION COMPLETED
1 = Did not complete <Upper secondary education—ISCED Level 3>
2 = <Upper secondary education—ISCED Level 3> (If you have not completed <post-secondary or tertiary education>, you will
3 = <Post-secondary, non-tertiary education—ISCED Level 4>
4 = <Short-cycle tertiary education—ISCED Level 5>
5 = <Bachelor’s or equivalent level—ISCED Level 6>
6 = <Master’s or equivalent level—ISCED Level 7>
7 = <Doctor or equivalent level—ISCED Level 8>
99 = Omitted or invalid

GEN\LEVEL OF FORMAL EDUCATION COMPLETED
1 = Did not complete Grade 12
2 = Finished Grade 12
3 = Finished post-matric certificate
4 = Finished Diploma
5 = Finished first degree
6 = Finished Honour's degree
7 = Finished Master's degree
8 = Finished Doctoral degree
99 = Omitted

GEN\MAJOR AREA OF STUDY\EDUCATION PRIM
1 = Yes
2 = No
6 = Logically not applicable
9 = Omitted or invalid

GEN\CHARACTERIZE\TCHS UNDERSTANDING
1 = Very high
2 = High
3 = Medium
4 = Low
5 = Very low
9 = Omitted or invalid

GEN\THINKING ABT CURR SCH\SAFE NEIGHBORH
1 = Agree a lot
2 = Agree a little
3 = Disagree a little
4 = Disagree a lot
9 = Omitted or invalid

GEN\BEING A TEACHER\CONTENT
1 = Every day 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\HOW OFTEN\RELATE TO STUDENTS LIVES
1 = Every or almost every lesson
2 = About half the lessons
3 = Some lessons
4 = Never
9 = Omitted or invalid

GEN\LIMIT TEACHING\LACKING KNOWLEDGE
1 = Not at all
2 = Some
3 = A lot
9 = Omitted or invalid

MAT\PERMITTED TO USE CALCULATORS
1 = Yes, with unrestricted use
2 = Yes, with restricted use
3 = No, calculators are not permitted
9 = Omitted or invalid

MAT\COMPUTER TABLET AVAILABILITY DURING MATH
1 = Yes
2 = No
9 = Omitted or invalid

MAT\LEARNING ACTIVITIES ON COMP\WHOLE CLASS
1 = Every or almost every day
2 = Once or twice a week
3 = Once or twice a month
4 = Never or almost never
6 = Logically not applicable
9 = Omitted or invalid

MAT\TOPICS\NUMBER\WHOLE NUMBER ORDERING
1 = Mostly taught before this year
2 = Mostly taught this year
3 = Not yet taught or just introduced
9 = Omitted or invalid

MAT\HOW OFTEN MATH HOMEWORK ASSIGNED
1 = I do not assign mathematics homework
2 = Less than once a week
3 = 1 or 2 times a week
4 = 3 or 4 times a week
5 = Every day
9 = Omitted or invalid

MAT\TIME SPENT ON HOMEWORK
1 = 15 minutes or less
2 = 16–30 minutes
3 = 31–60 minutes
4 = More than 60 minutes
6 = Logically not applicable
9 = Omitted or invalid

MAT\HOMEWORK\CORRECT
1 = Always or almost always
2 = Sometimes
3 = Never or almost never
6 = Logically not applicable
9 = Omitted or invalid

MAT\IMPORTANCE STRATEGIES\OBSERVING STUDENTS
1 = A lot
2 = Some
3 = None
9 = Omitted or invalid

MAT\TESTS ON COMPUTER OR TABLETS
1 = More than once a month
2 = Once a month
3 = Twice a year
4 = Once a year
5 = Never
9 = Omitted or invalid

MAT\<PROF DEVELOPMENT> HOURS
1 = None
2 = Less than 6 hours
3 = 6–15 hours
4 = 16–35 hours
5 = More than 35 hours
9 = Omitted or invalid

MAT\FORMAL PROF DEVELOPMENT\MATH HOURS
1 = None
2 = Less than 6 hours
3 = 6–15 hours
4 = 16–35 hours
5 = 36-50 hours
6 = 51-80 hours
7 = More than 80 hours
9 = Omitted

SCI\HOW OFTEN SCIENCE HOMEWORK ASSIGNED
1 = I do not assign science homework
2 = Less than once a week
3 = 1 or 2 times a week
4 = 3 or 4 times a week
5 = Every day
9 = Omitted or invalid

Teacher Participation Status Indicator
1 = Questionnaire not returned
2 = Questionnaire lost
3 = Questionnaire returned completed
4 = Questionnaire not returned, person related data derived
6 = Teacher removed from sample
9 = Omitted or invalid

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

Locale ID of Teacher Questionnaire
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)

School Emphasis on Academic Success-Teacher/IDX
1 = Very High Emphasis
2 = High Emphasis
3 = Medium Emphasis
9 = Omitted or invalid

Safe and Orderly Schools-Teacher/IDX
1 = Very Safe and Orderly
2 = Somewhat Safe and Orderly
3 = Less than Safe and Orderly
9 = Omitted or invalid

Teachers Job Satisfaction/IDX
1 = Very Satisfied
2 = Somewhat Satisfied
3 = Less than Satisfied
9 = Omitted or invalid

Teaching Limited by Student not Ready/IDX
1 = Very little
2 = Some
3 = A lot
9 = Omitted or invalid

Teachers Emphasis on Science Investigation/IDX
1 = About Half the Lessons or More
2 = Less than Half the Lessons
9 = Omitted or invalid

Teachers Majored in Education and Science
1 = Major in Education and Science
2 = Major in Education but not Science
3 = Major in Science but not Education
4 = All Other Majors
5 = No Formal Education Beyond Upper Secondary
9 = Omitted or invalid

Teachers Majored in Education and Mathematics
1 = Major in Education and Mathematics
2 = Major in Education but not Mathematics
3 = Major in Mathematics but not Education
4 = All Other Majors
5 = No Formal Education Beyond Upper Secondary
9 = 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 = 2006
2 = 2007
3 = 2008
4 = 2009
5 = 2010
6 = 2011
7 = 2012
8 = Other
99 = Omitted or invalid

GEN\OFTEN SPEAK <LANG OF TEST> AT HOME
1 = I always speak <language of test> at home
2 = I almost always speak <language of test> at home
3 = I sometimes speak <language of test> and sometimes speak another language at home
4 = I never speak <language of test> at home
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\WERE YOUR <PARENTS/GUARDIAN A> BORN IN <COUNTRY>
1 = Yes
2 = No
3 = I don´t know
4 = 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\HOW OFTEN\MADE FUN OF
1 = At least once a week
2 = Once or twice a month
3 = A few times a year
4 = Never
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

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

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

ADMINISTRATION MODE/DATA SOURCE STUDENT TEST
1 = Paper
2 = Electronic
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/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 Science Lessons/IDX
1 = High Clarity of Instruction
2 = Moderate Clarity of Instruction
3 = Low Clarity of Instruction
9 = Omitted or invalid

Students Confident in Mathematics/IDX
1 = Very Confident in Mathematics
2 = Somewhat Confident in Mathematics
3 = Not Confident in 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

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

Early Literacy Activities Before School/IDX
1 = Often
2 = Sometimes
3 = Never or almost never
9 = Omitted or invalid

Early Literacy Tasks Beginning School/IDX
1 = Very well
2 = Moderately well
3 = Not well
9 = Omitted or invalid

Home Resources for Learning/IDX
1 = Many Resources
2 = Some Resources
3 = Few Resources
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

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

GEN\LVL OF EDUCATION\FATHER/GUARDIAN A
1 = Did not go to school
2 = Some primary school (Grades 1-8)
3 = Finished Grade 9
4 = Finished Grade 12
5 = Finished post-matric certificate
6 = Finished Diploma
7 = Finished first degree
8 = Finished Masters or Doctoral degree
9 = Not applicable
99 = Omitted

GEN\LVL OF EDUCATION\CHILD WILL GO
1 = Finish Grade 9
2 = Finish Grade 12
3 = Finish post-matric certificate
4 = Finish diploma
5 = Finish Bachelor's degree
6 = Finish postgraduate degree: Master's or Doctorate
9 = Omitted

GEN\WHAT KIND OF MAIN JOB\FATHER/GUARDIAN A
1 = Has never worked for pay
2 = Small Business Owner Includes owners of small businesses (fewer than 25 employees) such as retail shops, services, resta
3 = Clerical Worker Includes office clerks; secretaries; typists; data entry operators; customer service clerks
4 = Service or Sales Worker Includes travel attendants; restaurant service workers; personal care workers; protective servic
5 = Skilled Agricultural or Fishery Worker Includes farmers; forestry workers; fishery workers; hunters and trappers
6 = Craft or Trade Worker Includes builders, carpenters, plumbers, electricians, metal workers; machine mechanics; handicraf
7 = Plant or Machine Operator Includes plant and machine operators; assembly-line operators; motor-vehicle drivers
8 = General Laborers Includes domestic helpers and cleaners; building caretakers; messengers, porters, and doorkeepers; farm
9 = Corporate Manager or Senior Official Includes corporate managers such as managers of large companies (25 or more employe
10 = Professional Includes scientists; mathematicians; computer scientists; architects; engineers; life science and health pr
11 = Technician or Associate Professional Includes science, engineering, and computer associates and technicians; life scienc
12 = Informal
13 = Not applicable
99 = Omitted

1 = No Fee paying
2 = Fee paying