Starting a new session in April will never suit our environment. April and may are very hot. Going out is very difficult for the students. Starting from Middle June is desirable. Students and teachers need not go out in hot sun. Especially for students it is very difficult. If they get grouped with other students, they like to play and they may not care for the heat. It is very dangerous.

But this private schools and corporate institutes, want to attract people. So they all start the classes in April itself. 

Many of the SSC students already got admitted to the colleges of their choice. SSC results are not declared. This is all marketing gimmicks and parents in their anxiety of good institution for their children admit their children .