He can't understand the definitions and formulas in the instructions in class, so the first thing to do is to learn the things in the book thoroughly. You can tutor him yourself or ask a tutor for your child. It is not recommended to go to make up classes. A lot of help can't be directed at learning, and make-up teachers focus on improving or expanding. For your child, improvement and expansion are not the focus at present, but the foundation, so making up lessons is not suitable for him. Hard lessons delay time, increase pressure, make him more reluctant to learn, and easily form fear. When he saw the problem, he thought he would not. What children need to do now is to recite formulas, understand definitions and understand examples. If not, ask the teacher and ask the classmates. Don't be embarrassed. There is no shame in seeking knowledge. After the formula example is finished, do it yourself. When you do the problem, see what conditions are given in the problem. These quantities are in that formula. Maybe those formulas can be used. Go through it in your mind, outline the range of the formula, and then consider which formula to apply. If it really doesn't work, look at the answer. If not, compare yourself with the answer. At which point, your thinking will be seriously deviated, leading to a dead end. After summing up, do the question again without an answer, then go over it in your mind, consider why the answer follows this idea, and remember what words you encounter. Then make changes and string together your own ideas. If he can't do this by himself, his parents can stay with him. Guide him and ask questions like "What conditions did you see before you came up with this idea". After a long time and more contact, it will be fine.