„Students who reported that, during their lessons, their peers don’t listen to what the teacher says, there is noise and disorder, the teacher has to wait a long time for students to quieten down, students cannot work well, and students don’t start working for a long time after the lesson begins tend to think that school is not useful for them or for their future.“
OECD (Hrsg.), „PISA in Focus 24“ (Jänner 2013), S. 2