You should find your teacher or classmate, tell your troubles and thoughts about the topic you are doing, listen to other people's methods, and correct your mistakes in solving problems; Of course, this kind of mistake is not necessarily that you can't do the problem, but it may also be a time-consuming mistake that spends too much time doing a problem.
I think this is the most effective way to improve math scores besides cultivating math interest. After all, the only thing we test students at school is the exam. ...