✔ 最佳答案
Well there are lots of reasons.
Traditionally, people believes that either boys' schools or girls' schools is better than co-ed school due to a variety of reasons, for example, the prevention of sexual harassment, reduce the possibilities of student's involvement in any relationships(thus allowing them to concentration on their studies, and this is the MAIN REASON), enhance the interaction between students(most people act freely among peers with same sex other than the opposite), etc..
Well you know all those 10As or 9As or whatever...most of them are from either boys' schools or girls' schools(DBS, DGS, La Salle, Queens).
Moreover, statistics conducted by the goverment shows that the average academic results from those boys' and girls' school are a lot better than those of co-ed schools...
Well of course there are negative sides of studying in either a boys' school or girls' school, however, it's just like a business - there is always trade off