In this case, individuals are different from individuals. If you brush the questions, first, you should do the questions and correct them in time after you finish them. Personally, I think it's best to correct the answers by yourself after finishing a lesson. In this case, if there are mistakes, they can be corrected on the spot. If you revise it every few days, it is very likely that you have forgotten your idea of doing this problem at that time. Then pay attention to the common problems in mathematics, and it is best to remember some models that are often tested in physics, and push them several times if something happens. Such as what conveyor belt model,, and so on. There are still many problems to be done. When you see this problem, you wonder what model it is, and then it's easier to do. Alas. Actually, it's up to you. The efficiency of doing the problem, whether you can persist, these are the key.