Stratum Bundesland
1 = Baden-Württemberg
2 = Bayern
3 = Berlin
4 = Brandenburg
5 = Hansestadt Bremen
6 = Hansestadt Hamburg
7 = Hessen
8 = Mecklenburg-Vorpommern
9 = Niedersachsen
10 = Nordrhein-Westfalen
11 = Rheinland-Pfalz
12 = Saarland
13 = Sachsen
14 = Sachsen-Anhalt
15 = Schleswig-Holstein
16 = Thüringen
17 = Sonderschule / Förderschule
18 = Berufliche Schulen

Grade 1
1 = Yes
2 = No
7 = N/A
8 = Invalid
9 = Miss

Public or private
1 = Public
2 = Private
7 = N/A
8 = Invalid
9 = Miss

Funding Government
9997 = N/A
9998 = Invalid
9999 = Miss

School Community
1 = Village
2 = Small Town
3 = Town
4 = City
5 = Large City
7 = N/A
8 = Invalid
9 = Miss

Available Schooling
1 = Two or More Schools
2 = One Other
3 = No Others
7 = N/A
8 = Invalid
9 = Miss

Repeat <grade> at <ISCED2>
996 = N/A - <ISCED level> not available in this school
9997 = N/A
9998 = Invalid
9999 = Miss

1 = 60% or more
2 = 40% up to 60%
3 = 20% up to 40%
4 = 10% up to 20%
5 = >0% up to 10%
6 = None
7 = N/A
8 = Invalid
9 = Miss

Shortage of Sci Teachers
1 = Not at all
2 = Very little
3 = To some extent
4 = A lot
7 = N/A
8 = Invalid
9 = Miss

Streaming by levels
1 = For all subjects
2 = For some subjects
3 = Not for any subject
7 = N/A
8 = Invalid
9 = Miss

Standardised Tests
1 = Never
2 = 1-2 times a year
3 = 3-5 times a year
4 = Monthly
5 = More than once a month
7 = N/A
8 = Invalid
9 = Miss

Pressure Academic standards
1 = Many Parents
2 = Minority of Parents
3 = Largely absent
7 = N/A
8 = Invalid
9 = Miss

Admission - Residence
1 = Never
2 = Sometimes
3 = Always
7 = N/A
8 = Invalid
9 = Miss

Transfer - Low Achievement
1 = Not likely
2 = Likely
3 = Very likely
7 = N/A
8 = Invalid
9 = Miss

Responsibility teacher hire - Principal Q24a1
1 = Tick
2 = No Tick
7 = N/A
8 = Invalid
9 = Miss

Professional development
1 = Never
2 = Seldom
3 = Quite often
4 = Very often
7 = N/A
8 = Invalid
9 = Miss

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

Total school enrolment
99997 = N/A
99998 = Invalid
99999 = Miss

School Type
1 = Public
2 = Private government-dependent
3 = Private independent
7 = N/A
8 = Invalid
9 = Miss

Index of academic school selectivity
1 = Two factors are never considered
2 = At least one sometimes but neither always considered
3 = At least one always considered
7 = N/A
9 = Miss

Ability grouping between classes
1 = Not for any subjects
2 = For some subjects
3 = For all subjects
7 = N/A
9 = Miss

Ressourcen an der Schule im Hinblick auf Elternarbeit - aa
1 = Stimmt überhaupt nicht
2 = Stimmt eher nicht
3 = Stimmt eher
4 = Stimmt ganz genau
7 = nicht bearbeitbar
8 = nicht valide
9 = nicht bearbeitet

Ressourcen an der Schule im Hinblick auf Elternarbeit - ca
1 = Nie
2 = Selten
3 = Häufig
4 = Sehr häufig
7 = nicht bearbeitbar
8 = nicht valide
9 = nicht bearbeitet

Zusatzunterricht für leistungsstarke Schüler Deutsch
1 = Ja
2 = Nein
7 = nicht bearbeitbar
8 = nicht valide
9 = nicht bearbeitet

Ganztagsangebot
1 = nein
2 = ja, an 1 Tag
3 = ja, an 2 Tagen
4 = ja, an 3 Tagen
5 = ja, an 4 Tagen
6 = ja, an 5 Tagen
7 = nicht bearbeitbar
8 = nicht valide
9 = nicht bearbeitet

Verantwortung für erweiterte Angebote - organisatorische Ausgestaltung Schule
1 = Tick
2 = No Tick
7 = N/A
8 = Invalid

Verbindlichkeit des Ganztagsangebots
1 = generell freiwillig
2 = freiwillig, angemeldet
3 = verbindlich für einen Teil
4 = verbindlich für alle
7 = nicht bearbeitbar
8 = nicht valide
9 = nicht bearbeitet

Schulart (7-stufig)
1 = HS
2 = MBG
3 = RS
4 = IG
5 = GY
6 = BS
8 = SO

German language club
1 = Yes
2 = No
3 = Miss

Admission - record of academic performance
2 = Never
3 = Sometimes
4 = Always
5 = Miss

Hiring teachers - Schulleitung
1 = Tick
2 = No Tick
3 = Missing

Teacher start salaries - Schulkonferenz
1 = No Tick
2 = Missing

Hiring teachers
1 = 111211
2 = 111212
3 = 111221
4 = 111222
5 = 112122
6 = 112211
7 = 112212
8 = 112221
9 = 112222
10 = 121212
11 = 121222
12 = 122122
13 = 122211
14 = 122212
15 = 122221
16 = 122222
17 = 212222
18 = 221212
19 = 222122
20 = 222211
21 = 222212
22 = 222221
23 = Missing

Firing teachers
1 = 112211
2 = 112222
3 = 121111
4 = 122122
5 = 122211
6 = 122212
7 = 122221
8 = 122222
9 = 222112
10 = 222122
11 = 222211
12 = 222212
13 = 222221
14 = 222222
15 = Missing

Teacher start salaries
1 = 112222
2 = 122122
3 = 122222
4 = 222112
5 = 222121
6 = 222122
7 = 222211
8 = 222212
9 = 222221
10 = 222222
11 = Missing

Salary increase
1 = 112222
2 = 122121
3 = 122122
4 = 122211
5 = 122212
6 = 122221
7 = 122222
8 = 212222
9 = 222112
10 = 222121
11 = 222122
12 = 222211
13 = 222212
14 = 222221
15 = 222222
16 = Missing

Budget formulation
1 = 111122
2 = 111222
3 = 121122
4 = 122121
5 = 122122
6 = 122212
7 = 122221
8 = 122222
9 = 221121
10 = 221122
11 = 221222
12 = 222111
13 = 222112
14 = 222121
15 = 222122
16 = 222211
17 = 222212
18 = 222221
19 = 222222
20 = Missing

Budget allocation
1 = 111122
2 = 111222
3 = 112122
4 = 112222
5 = 121121
6 = 121122
7 = 121212
8 = 121222
9 = 122122
10 = 122221
11 = 122222
12 = 211122
13 = 211222
14 = 212222
15 = 221122
16 = 221221
17 = 221222
18 = 222111
19 = 222121
20 = 222122
21 = Missing

Disciplinary policies
1 = 111122
2 = 111211
3 = 111212
4 = 111221
5 = 111222
6 = 112212
7 = 112221
8 = 112222
9 = 121212
10 = 121221
11 = 121222
12 = 122212
13 = 122221
14 = 122222
15 = 211222
16 = 212222
17 = 221221
18 = 221222
19 = 222221
20 = 222222
21 = Missing

Assessment policies
1 = 111211
2 = 111212
3 = 111221
4 = 111222
5 = 112211
6 = 112221
7 = 112222
8 = 121222
9 = 122222
10 = 211221
11 = 211222
12 = 212212
13 = 212221
14 = 212222
15 = 221221
16 = 221222
17 = 222211
18 = 222212
19 = 222221
20 = 222222
21 = Missing

Student admittance
1 = 111221
2 = 112111
3 = 112212
4 = 112222
5 = 121212
6 = 121222
7 = 122112
8 = 122121
9 = 122122
10 = 122211
11 = 122212
12 = 122221
13 = 122222
14 = 212222
15 = 221222
16 = 222122
17 = 222211
18 = 222212
19 = 222221
20 = 222222
21 = Missing

Textbook selection
1 = 111211
2 = 111221
3 = 111222
4 = 112221
5 = 112222
6 = 121222
7 = 122122
8 = 122221
9 = 122222
10 = 211221
11 = 211222
12 = 212221
13 = 212222
14 = 221221
15 = 221222
16 = Missing

Course content
1 = 111211
2 = 111212
3 = 111221
4 = 111222
5 = 112211
6 = 112221
7 = 112222
8 = 121212
9 = 122222
10 = 211221
11 = 211222
12 = 212212
13 = 212221
14 = 212222
15 = 221211
16 = 221221
17 = 221222
18 = 222211
19 = 222212
20 = 222221
21 = 222222
22 = Missing

Courses offered
1 = 111111
2 = 111211
3 = 111212
4 = 111221
5 = 111222
6 = 112212
7 = 112221
8 = 112222
9 = 121211
10 = 121212
11 = 121221
12 = 121222
13 = 122122
14 = 122212
15 = 122221
16 = 122222
17 = 211222
18 = 212222
19 = 221222
20 = 222122
21 = 222221
22 = 222222
23 = Missing

Hiring teachers
1 = 11111
2 = 11112
3 = 11121
4 = 11122
5 = 11211
6 = 11212
7 = 11221
8 = 11222
9 = 12112
10 = 12122
11 = 12211
12 = 12212
13 = 12221
14 = 12222
15 = 21222
16 = 22112
17 = 22122
18 = 22211
19 = 22212
20 = 22221
21 = Missing

Firing teachers
1 = 11211
2 = 11222
3 = 12111
4 = 12122
5 = 12211
6 = 12212
7 = 12221
8 = 12222
9 = 22112
10 = 22122
11 = 22211
12 = 22212
13 = 22221
14 = 22222
15 = Missing

Teacher start salaries
1 = 11222
2 = 12122
3 = 12222
4 = 22112
5 = 22121
6 = 22122
7 = 22211
8 = 22212
9 = 22221
10 = 22222
11 = Missing

Salary increase
1 = 11222
2 = 12121
3 = 12122
4 = 12211
5 = 12212
6 = 12221
7 = 12222
8 = 21222
9 = 22112
10 = 22121
11 = 22122
12 = 22211
13 = 22212
14 = 22221
15 = 22222
16 = Missing

Budget formulation
1 = 11122
2 = 12121
3 = 12122
4 = 12212
5 = 12221
6 = 12222
7 = 22111
8 = 22112
9 = 22121
10 = 22122
11 = 22211
12 = 22212
13 = 22221
14 = 22222
15 = Missing

Budget allocation
1 = 11122
2 = 11222
3 = 12112
4 = 12121
5 = 12122
6 = 12221
7 = 12222
8 = 21122
9 = 21222
10 = 22111
11 = 22121
12 = 22122
13 = Missing

Disciplinary policies
1 = 11111
2 = 11112
3 = 11121
4 = 11122
5 = 11212
6 = 11221
7 = 11222
8 = 12112
9 = 12121
10 = 12122
11 = 12212
12 = 12221
13 = 12222
14 = 21122
15 = 21222
16 = 22121
17 = 22122
18 = 22221
19 = 22222
20 = Missing

Assessment policies
1 = 11111
2 = 11112
3 = 11121
4 = 11122
5 = 11211
6 = 11221
7 = 11222
8 = 12122
9 = 12222
10 = 21121
11 = 21122
12 = 21212
13 = 21221
14 = 21222
15 = 22121
16 = 22122
17 = 22211
18 = 22212
19 = 22221
20 = 22222
21 = Missing

Student admittance
1 = 11111
2 = 11121
3 = 11212
4 = 11222
5 = 12112
6 = 12121
7 = 12122
8 = 12211
9 = 12212
10 = 12221
11 = 12222
12 = 21222
13 = 22122
14 = 22211
15 = 22212
16 = 22221
17 = 22222
18 = Missing

Textbook selection
1 = 11111
2 = 11121
3 = 11122
4 = 11221
5 = 11222
6 = 12122
7 = 12221
8 = 12222
9 = 21121
10 = 21122
11 = 21221
12 = 21222
13 = 22121
14 = 22122
15 = Missing

Course content
1 = 11111
2 = 11112
3 = 11121
4 = 11122
5 = 11211
6 = 11221
7 = 11222
8 = 12112
9 = 12222
10 = 21121
11 = 21122
12 = 21212
13 = 21221
14 = 21222
15 = 22111
16 = 22121
17 = 22122
18 = 22211
19 = 22212
20 = 22221
21 = 22222
22 = Missing

Courses offered
1 = 11111
2 = 11112
3 = 11121
4 = 11122
5 = 11212
6 = 11221
7 = 11222
8 = 12111
9 = 12112
10 = 12121
11 = 12122
12 = 12212
13 = 12221
14 = 12222
15 = 21122
16 = 21222
17 = 22122
18 = 22221
19 = 22222
20 = Missing

Decision making national
1 = 1111
2 = 1112
3 = 1121
4 = 1122
5 = 1211
6 = 1212
7 = 1221
8 = 1222
9 = 2111
10 = 2211
11 = 2212
12 = 2221
13 = 2222
14 = Missing

Decision making school
1 = 1111
2 = 1112
3 = 1121
4 = 1122
5 = 1212
6 = 1222
7 = 2111
8 = 2112
9 = 2121
10 = 2122
11 = 2211
12 = 2212
13 = 2221
14 = 2222
15 = Missing

Decision making parents
1 = 1111
2 = 1112
3 = 1122
4 = 1212
5 = 1222
6 = 2111
7 = 2112
8 = 2121
9 = 2122
10 = 2211
11 = 2212
12 = 2221
13 = 2222
14 = Missing

Decision making teachers
1 = 1111
2 = 1112
3 = 1122
4 = 1211
5 = 1212
6 = 1221
7 = 1222
8 = 2111
9 = 2112
10 = 2122
11 = 2211
12 = 2212
13 = 2221
14 = 2222
15 = Missing

Decision making students
1 = 1111
2 = 1112
3 = 1212
4 = 1222
5 = 2111
6 = 2112
7 = 2121
8 = 2122
9 = 2211
10 = 2212
11 = 2221
12 = 2222
13 = Missing

Decision making external
1 = 1111
2 = 1122
3 = 1211
4 = 1221
5 = 1222
6 = 2121
7 = 2211
8 = 2221
9 = 2222
10 = Missing

2 = 60% or more
3 = 50% or more, but less than 60%
4 = 40% or more, but less than 50%
5 = 30% or more, but less than 40%
6 = 20% or more, but less than 30%
7 = 10% or more, but less than 20%
8 = More than 0%, but less than 10%
9 = None
10 = Miss