In Tamilnadu? Its very hard to tell in the group forum. Please be specific.
TN is a big place with lots of wonderful schools.....schools each locality have a specialty. For example in Coimbatore the infrastructure is awesome in most schools...large playgrounds, big auditoriums etc., in Salem / Namakkal they are very result and mark focused.....intense efforts for board exams and nothing much else, in Chennai you have some wonderful curriculum and schools with excellent teachers.
SO please specify which city and locality you are looking into and Iam sure lots of users here will help.