„An argument for academically selective school admissions policies is that they are claimed to support the best match between students and schools; and thus increase the efficiency of education in terms of educational performance. Best match could be related for example, to student interest (specialist schools), ability or aptitude, or teachers (it is easier for teachers to manage classes with similar abilities, interests, etc.).“
EU-Kommission (Hrsg.), Equity in school education in Europe (2020), S. 100.