تاریخ جمعآوری: 2015-01-01
گزینههای پاسخ: PISA students only sampled, PISA students sampled plus grade sampled students with method 1, PISA students sampled plus grade sampled students with method 2, PISA students sampled plus grade sampled students with class sampling (method 3), PISA students only sampled plus teachers, PISA students sampled plus grade sampled students with method 1, PISA students sampled plus all non-PISA grade students, PISA students sampled plus all non-PISA grade students, plus teachers, Students sampled for national option only, Students sampled for national option only plus teachers, PISA students sampled plus grade sampled students with method 2, plus teachers, PISA students only sampled with some identified as a population of interest (and all of these are sampled), PISA students only sampled with some IDed as a population of interest (and all of these are sampled), plus teachers, PISA students sampled plus grade sampled students with class sampling (method 3), plus teachers, PISA students sampled plus TCS2 of non-PISA students, PISA students sampled plus TCS2 of non-PISA students, plus teachers, PISA students only sampled with variable sample size within schools, PISA students only sampled with variable sample size within schools, plus teachers, 62, 52