„It will remain very difficult to integrate students who require special attention into mainstream schooling. Youth with strong learning difficulties or social problems may then be served best by being taught in special classes with smaller class-sizes, an adjusted and more practically-oriented curriculum, and specially-trained teachers and support staff.“
Univ.-Prof. Dr. Stéphane Carcillo u. a., „Investing in Youth – Policies and Challenges“ (2014), S. 9