First of all, we must distinguish the situation of students. Different students should have different methods.

For good students, we should give strict education and explain open questions to make them more perfect.

For middle school students, it is necessary to take the point instead of the face, carry out special training, and drive more related types of problems with one problem to achieve the goal of solving all problems together.

For students with learning difficulties, we should be steady and steady, pay attention to the foundation, work together, not be greedy, and learn to expect.

Personal opinion, don't look up the literature