1. Listen carefully in class, process and sort out what the teacher said (generally, children with poor math don't have time to sort out notes, or don't like to sort out notes, good students don't need notes very much, poor students should remember and read more), and translate what the teacher said into natural language. For example, I say that two vector lines are equivalent to b = λ a.

2. Using graphic memory, Buzan's mind map (making mind maps in high school mathematics is actually a bit messy) tells us that graphics can easily help memory (improve memory ability 100 times or more), so I always talk by looking at pictures in class and use graphics to help me remember formulas and help me solve problems.

3. Correct mistakes after class. Philosophically speaking, it is impossible for people to step into the same river twice, but students who make mistakes in their studies often make mistakes, and preventing them from making mistakes again can greatly improve their grades.

4. Understand the topic, why do you want to do it? Paulia's "How to Solve a Problem", students don't have time to study it, but cite appropriate questions, such as asking themselves, why do you want to do this step, why do you want to simplify it, why do you want to ... This kind of thinking habit can improve your problem-solving ability, which I also explained in class.

5. Proper practice, I don't recommend sea tactics, but it is the most effective, but it should be practiced on the basis of 1.2.3.4, otherwise it won't be difficult.