I just graduated from junior high school and my experience is more suitable for you. In fact, in the last year, I spent most of my time reviewing and doing problems. I transferred to the school where I graduated in the eighth grade. The textbooks for grade 6.7 are completely different. When others are reviewing, I will learn new lessons there. But in the end, I got into high school with 28.

Science is mainly about understanding how to do problems. Do more questions. If you do more, you will naturally have the idea of doing the problem when you see the problem. Going to cram school is not what the teacher said. So do you listen to the teacher or the cram school when you do the problem? So it's best to work hard by yourself or ask for experience from former classmates. Don't go to any cram school.