1. Whether the situation setting meets the requirements of the topic (just for the introduction, it doesn't take too much time);

2. Whether the introduction of the new curriculum is timely and in place (timely refers to the introduction in the first point and in place refers to the analysis);

3. Whether students participate widely (it is not necessary to discuss in groups, and the discussion in class will not have ideal results unless it is prepared before class);

4. Whether the example explanation is in place, whether it can be solved with old knowledge without using it, and thus illustrates the necessity of new knowledge);

5. Have you left some time for students to practice and think?

6. Induction and summary are essential (induction of knowledge points and the role of new knowledge).