You should pay close attention to your situation at this time. Before the summer vacation, you must read all the top-ranked textbooks and finish the after-school exercises (you can't see the answers until you remember them). This process is a solid foundation, painful, but the most important. If you don't have many classes, I suggest you spend half your time watching math during the day. I think you are clear-headed and efficient during the day, which varies from person to person. If you are efficient at night, you should read math all night. I don't think we can spend too much time reading math. Postgraduate entrance examination for mathematics is the most interesting thing.
After reading the basics, you still need to do a lot of exercises. This stage is the whole summer vacation. You can choose Li Yongle's math book or 660 questions to do exercises. The practice process is more painful, and you will feel that there are many things you can't do, but you must try your best to understand and summarize. For example, what are the methods to find the limit, and so on. The most important thing at this stage is to summarize and be familiar with the methods of doing problems, and the time for math review should account for half or more of the whole day.
After the summer vacation, enter the sprint stage, do some simulation questions, and do the second summer vacation questions at the same time. You still have to make a summary. You can't see the formula until you remember where to use it. You have to see the problem and think of many methods or formulas. This is to learn and use them flexibly. At this stage, it is mainly to exercise test-taking skills and increase proficiency, and we must not slack off. Mathematics review time also takes about half a day. Finally, when you are backing politics, you can slightly reduce the time for studying mathematics.
Duang duang duang, practice makes perfect in mathematics.