First of all, the new textbook A does not have an extremely complete new teaching system from compulsory 2 to compulsory 4. Secondly, for A, we can't just talk about the increase or decrease of content. But as far as compulsory courses 1 and 2 are concerned, the original compulsory course 5 or elective course has entered a new compulsory course A, which can be said to be a great change, and the thickness of these two books has reached a peak.

Personally, I think A is more difficult to understand, not because the content is difficult, but because the teaching modules and methods will make teachers hard to prevent and can only be implemented according to the old textbooks. Old textbooks are more modular and easy to analyze and use. However, the new examples in the new textbook and the deeper after-school questions are also a bright spot, which is very different from the previous methods.

If you want to focus on textbooks, or on self-study and comprehensive improvement, you can consider using B new.

Personally, I think the reasons for the success of the new textbook B are as follows:

1. It is modular and easy for students to understand.

2. It won't give you a conclusion directly like A, but it will be interpreted in a way that you can understand.

3. There are a lot of exercises after class, which are divided into ABC three groups, which is very beneficial to practice.

4. Good order, such as trigonometric function. Because B has studied vectors before, it can be directly used as a tool to solve problems.

5. Textbooks

Therefore, we should not only analyze the teaching materials from the increase or decrease of content, but also grasp the direction of its intervention, the degree of conformity with the requirements of the new curriculum standard, and the degree of understanding, analysis and training. Personally, this is the key.