If you want to improve your math scores, the most useful way is to do more problems. When you have a certain number of problems, you will have certain ideas to solve them yourself.
Of course, the wrong questions must be carefully understood and never forgotten. It is best to prepare a set of wrong questions. Finally, read the wrong questions when reviewing. And we must learn to ask questions, not to answer them, but to think in steps, which is the key to improve our math scores quickly.