There are some difficulties in high school mathematics. The most difficult thing in high school mathematics is function, and nothing else is difficult.

After-class learning "three kinds of review"

(1) Review in time-after class every day, you should read textbooks and take notes to complete two tasks:

① Dig deep into theories (concepts, theorems, formulas, laws).

2 deep cases. Only by "knowing why, knowing why" can we extrapolate.

(2) Unit review-After each unit is completed, unit review shall be conducted to complete the following tasks:

① Organize the knowledge points in series to form the theoretical system of the unit.

② The mathematical ideas and methods of inductive unit theory make understanding reach a higher level.

③ Select typical examples and exercises in the unit for further study and review. Through the unit review, Zhou Qing problem was completely solved.

(3) Review before the exam and summarize after the exam.