Prepare a corrected book, accumulate all the difficult ones, don't write the answers when copying, and take out the questions every one or two days.

Do a question for at least five minutes, don't ask others, don't just let your classmates tell you the answer, but tell you the idea.

4. Preview before class and attend class with questions; Review in time.

I am also a junior high school student. This is my own experience. I hope it helps you, O(∩_∩)O~