2. Do your homework carefully after class and correct any mistakes immediately. It's best to finish your homework with a classmate who is equal to your own strength, and then check the answer (your answer) together. If you find any difference, discuss it together and find out the reason. Generally, one of them made a low-level mistake, and more attention can be paid to avoid it. Doing problems together is one of the ways. )
3. If possible, preview is very useful, and targeted lectures can save the energy lacking in high school under heavy pressure.
As for review, it is generally enough to follow the teacher. Unless you find that there is a kind of problem that you are always wrong or can't do, you have to review some of it yourself.
The above is the advice of those who have experienced it. I hope it helps you.