> If you are proposing selective schooling etc. there is a danger of creating social segregation which can reduce social mobility and as a result social cohesio

> If you are proposing selective schooling etc. there is a danger of creating social segregation which can reduce social mobility and as a result social cohesion. In Romania we have elite high-schools where admissions is based on exams (mostly math). This means that the pupils a class will be of somewhat similar intelligence, and makes things easier for teachers. The best pupils are encouraged to participate in olympiads, and the worst usually transfer to lower-rated institutions. I think this system works quite well (apart from the fact that the very lowly rated high-schools are completely useless).