It is very important to remember the knowledge points supplemented by textbooks and teachers in class or when talking about exercises! As for the flexible use of everything, don't be afraid, just look at the problems. (Mathematics) Don't be afraid of science mathematics. The whole thing is to guide more than three sets of certificates. If you have a good foundation, start with the questions, no matter how simple or difficult (as long as you can see the questions in your hand)! Strive to overcome the problem! If the foundation is not good, it will be easy to deal with. Take time to talk to the teacher and see your situation, but I don't like talking to the teacher. If you do the same, there is another way. Prepare a special notebook, write down the useful exercises that the teacher said in class (the teacher's exercises are representative), and do it again by yourself, no matter who asks! May you be admitted to an ideal university in the coming year! (