„There is a positive correlation between average class size and the reported proportion of students with behaviour problems.“
OECD (Hrsg.), Education at a Glance 2015: OECD Indicators“ (2015), S. 418
„There is a positive correlation between average class size and the reported proportion of students with behaviour problems.“
OECD (Hrsg.), Education at a Glance 2015: OECD Indicators“ (2015), S. 418