First of all, you need to pay attention to whether the after-school exercises in the math textbooks you use for postgraduate entrance examination are worth doing. Generally speaking, I don't need to spend too much time on the textbook exercises produced by my university. Do it if you are interested.

Secondly, I recommend three magic weapons for postgraduate entrance examination: 1. Mathematics textbook II. Chen Wendeng's Guide to Mathematics III. These three are indispensable. Read math textbooks repeatedly. Every time you read it, you will get different results. Don't leave the textbook at every stage. Combined with reading textbooks, we should focus on the problems in Chen Wendeng. The requirement is to do each question at least three times. When we do it for the last time, we should try not to read the answers in the book. I believe we will get new experiences every time. When I go to Chen Wendeng for the second time, I will start to do the real questions over the years. Real questions over the years are the best material to improve your grades. Do it at least three times and classify each topic according to the math textbook and the knowledge points obtained. Finally, I have the ability to do one or two sets of simulation questions. To tell the truth, doing too many simulation questions may mislead you.

Thirdly, the postgraduate entrance examination is a test of one's perseverance. Go to school practically, don't be impetuous. I believe you will get good grades. As for remedial classes, I just seek spiritual comfort, which may hurt you.