2. Just do some typical questions. Doing too much wastes time, and doing too little will make you unable to master some knowledge points (this moderate amount will do, depending on your personal level). To improve the efficiency of doing problems (this requires you to master the knowledge in the textbook and look at the ideas and methods of solving problems in the textbook).
Just don't be distracted when the teacher is talking about the key points. No one can concentrate on a lesson.
4. Look at more examples and try to do it yourself. Don't do it too fast at first, but do it quickly after you are familiar with it and answer accurately (this requires you to master the formula skillfully). Better get up early and recite.
5. Read more about the basic knowledge in the textbook (master it skillfully). After all, most of the questions in the exam are very basic, and most students will not do difficult questions. Do more typical questions (questions that will be given in the exam and the knowledge points of their application).