There is no such thing as a crash in high school mathematics. As a college student, what I want to say is that if you can understand the basic knowledge of high school mathematics, and then you can "do" 60% problems, you can "quickly" solve the foundation of high school.

Of course, that's ideal. Mathematics in senior high school is actually basic knowledge. Teachers are very experienced in how to master the basic knowledge. Now everyone hates the sea tactics, so do I, but I have to admit that the sea tactics are the most effective method in mathematics. You won't be embarrassed when you do the problem, and it's easy to learn. This is a virtuous circle. As for the vicious circle, you know. . . . . .

So, do more questions. . . . . . As for preview and review, it is a matter of method. The most important thing is to find out what is going on. If you can understand in class, you might as well go out for two laps to change your mind when you have time. High school time is really precious! But if you don't understand in class and don't want to preview and review, then hehe.

You're upstairs. You should do more wrong questions. It is very important to know whether you are wrong because you have not mastered the foundation or are not careful.

In addition: some bt problems, don't die of brain cells. Sometimes, the idea is right and you do it right away, but the idea is wrong and it will be useless for a day. There are many ways to solve problems in advanced mathematics. If you want to understand the last question, look at advanced mathematics.

One more thing: high school time is precious, and learning is the most important! Learning is the most important thing! Learning is the most important thing! But! Some people will not be there if they miss it, and they will cherish it.