If you play sport, you train. If you play a musical instrument, you practice. Practicing and training help you to perform better. If you go to college, you should be studying outside of your lectures and practical work. Studying works in the same way as practicing a musical instrument or training - studying will help you get better at college and will help you do better at exams.
These pages suggest ways to study more effectively, and to be more successful when you take tests or exams.
Note: the ideas on these pages are just suggestions - you don't have to try any of them if you don't want to. If you do try them, some might work for you and some might not. That's fine. The important thing is to find a routine of some kind that works for you.