Main study 2009/10: Last year group which is not affected by the reform; study number A70

1 Master Sample: Grade 12 students in Thuringia

1.1 Target persons: Students

• Sample: Access to the population of all Grade 12 students in Thuringia was gained via simple random sampling of 32 grammar schools. All students in Grade 12 at these schools were invited to participate in this survey. The random sampling of grammar schools considered an explicit stratification. The first stratum comprised all grammar schools focusing on natural sciences, the second stratum contained all remaining grammar schools in Thuringia. Within these two strata a simple random sampling was performed.

1.2 Context persons: Parents

• Definition: All parents of selected students were invited to participate.

1.3 Context persons: Teachers

• Definition: All Grade 12 teachers at selected schools teaching mathematics, German, English, biology, chemistry, and physics received a questionnaire.

Field time: January 17, 2011 - January 28, 2011

Data collection: IEA DPC - IEA Data Processing and Research Center, Hamburg

Mode of survey: Written questionnaire and tests (PAPI)