In order to perform well in your coaching institutes make sure you give full concentration at the time of your classes.

Revision is very imporatnt to perform well in your classes.

Make a habit to revise the chapter which is taught in the class and try to solve MCQs  related to that subject.

You should also read the chapter in advance which is going to start. So, that you can understand it better.

If you have any doubt make sure you clear at that time only. Don't get hesitate if it is small query.

You can solve mock test series to analyse your preparation level time to time and work on your strength and wekaness.

You can also make a proper time table according to your comfort. set your daily and weekly targets and try to complete them.

It is very important to take a feed back from your teachers to improve your performance.

Good Luck!!