CBSE

Hello Nayeem, you have indeed ask a very crucial critical and important query. There are lots of students who successfully take admission in prestigious institutes without any extra coaching. However what a student like you must remember is that what is the evidence and practice makes you go nearer to success. Regular studies and repeated going through the syllabus by understanding that are crucial inputs needed for successful attempt at admission. Teachers in extra coaching classes do exactly this and gets students into the stream of regular studies. In addition I would advise you to undertake mock tests so that you come to know as to how much time you take to solve the questions and also come to know you are ability to solve this questions successfully. Best wishes to you.