At first when I was in class nine I joined a coaching near my house.It really helped me lot and as well as teaches us team work, helps a lot to increase our credebility if and only if a student is sincere.If you dont pay attention to the classes it will be of no use to you.The is a centre by relience company but all the time will be wasted if you wont pay any attention to the classes they provide the beat teachers.It will be very helpful to you according to me .