The first is the teaching level of mathematical knowledge and skills.

Focus on solving the problem of "what is it and how to do it";

The second is the teaching level of mathematical thinking methods.

Focus on solving the problem of "what kind of ideas and methods to use";

The third is the teaching level of mathematical thinking.

Focus on solving the problem of "how to think of doing this and why to do it";

The fourth is the teaching level of mathematical spirit and culture.

Emphasis is placed on promoting the harmonious development of students' mind, personality, concept and spirit.