First, adjust the mentality.
Because I have read the third year of senior high school, I usually face the problem of lax thinking when I study knowledge again. That is to say, teachers don't want to listen to what they say, and then gradually become the habit of unconsciously not attending classes. So I suggest you adjust your mentality first. Facing the knowledge you know, you should review it well. Facing the problems you have done, try to be perfect. Don't leave anything out or muddle along. Your mentality comes first.
Second, actively do the problem
Mathematics learning, especially high school mathematics learning, is largely basic learning and deduction. It is suggested that after mastering the basic knowledge, some training should be carried out through a certain amount of targeted exercises. Practice makes perfect! On the one hand, by doing problems, the feeling of doing problems is gradually cultivated, just like the "feel" of playing ball; On the other hand, you can train your thinking by doing problems, and gradually sum up the general rules of doing problems (this should be summed up by yourself, not copied from others, no matter how good other people's things are), and the training of doing problems is necessary.
Third, think in time.
Doing problems is very important, but it is more important than just doing problems. By doing problems, consolidate knowledge, master methods and train thinking. However, you can't just do the problem, and you can't do the problem for the sake of doing it. We should also think, precipitate and summarize. Only by stopping the pace of rushing forward in time and thinking and summing up in time can we find something and gain something.
Finally, I want to say that the best shortcut is to accept, master, use, criticize and finally use it for me.
I wish you good grades! The words of a family may not be correct, but I hope I can help you and give you more thoughts ~ ~ Come on! Because we basically have no choice ~