You can try to reason about the theorems in the textbook yourself. This will not only improve your proof ability, but also deepen your understanding of the formula. There are many exercises. Basically, after each class, you have to do after-school exercises (excluding the teacher's homework).

The improvement of math scores and the mastery of math methods are inseparable from students' good study habits. Therefore, good math study habits include: listening, reading, exploring and doing homework.

Listening: We should grasp the main contradictions and problems in class, think synchronously with the teacher's explanation as much as possible, and take notes when necessary. After each class, we should think deeply, sum up and make a lesson.

Reading: When reading, you should carefully scrutinize and understand every concept, theorem and law. For example, you should learn from others by connecting with similar reference books to increase your knowledge and develop your thinking.

Inquiry: Learn to think, explore some new methods after solving problems, learn to think from different angles, and even change conditions or conclusions to find new problems. After a period of study, we should sort out our own ideas and form our own thinking rules.

Homework: review before you do your homework, think before you start writing, and grasp a large piece of a class of questions. Homework should be serious and writing should be standardized. Only in this way can you learn math well.

In short, in the process of learning mathematics, we should realize the importance of mathematics, give full play to our subjective initiative, pay attention to small details, develop good math learning habits, and then cultivate the ability to think, analyze and solve problems, and finally learn mathematics well.

Chemistry:

Mainly remember some properties and write equations. Literally, take a look and write it down. In theory, the key is to understand. If you understand, you can extrapolate. For example, to write a correct chemical equation, we must first write the chemical formula of each reactant and product. To write the correct chemical formula, we must find out the valence. If you just rely on rote memorization, it is easy to forget during the exam. Understanding is the most important thing. So you should remember more and practice more, such as multiple-choice questions. Teachers give you some special properties to choose from, and more practice can help you remember invisibly. The optical recording effect is not good. As you practice the properties of those special substances more and more, you will naturally remember them. The big problem is reasoning and writing equations. Once you have a good foundation, you won't be afraid.

Physics:

Mainly the understanding of concepts and formulas. For the concept, we must grasp it well, and doing more multiple-choice questions is conducive to your understanding and grasp of the concept. But when you do the questions, you must take every question seriously and understand every option. The calculation problem is the accurate use of the formula. Therefore, we should have a special understanding of the meaning of the formula. Practice more, and the questions are actually similar.

In short, it is a process of accumulation. The more you know, the better you learn, so remember more and choose your own method.

I wish you success in your study!