Hi there!

Self-study is the key to ace any exam!

However, I understand a lot of your time would be consumed in the school premises and coaching institutes. Considering, you spend a total of 10 hours outside your home in a day, what you can do is to take out atleast 2.5 to 3 hrs daily for self-study, preferably during the night hours before going to sleep. During this time, you must study the concepts being taught in your school and coaching classes and understand them substantially. Keep a target of studying atleast 2 subjects a day. And alternately on every sunday take out atleast 5 hours to revise whatever you learnt in a weak and attempt several small tests. This will help you strengthen your concepts!

Hope it helps.

Thanks