2, fully prepare lessons, and benefit in 45 minutes. What to talk about in each class, teaching objectives, teaching difficulties, teaching process design, etc. It should be clear that this requires adequate preparation before class. For every class, don't read the book. Every class should have a soul. After each class, you should give yourself a sense of accomplishment and students a sense of satisfaction. At the same time, when we have made enough preparations before class, the next key is how to show the prepared content incisively and vividly within the specified time, so that students can accept it to the maximum extent and also arouse their thinking after class. This requires very good skills, because many times we are ready in class, but we can't say it. Of course, I think more students should participate in thinking and improve their independent thinking ability and practical ability. In the course of lectures, we should not talk about topics for the sake of talking about topics. Be sure to talk about the content of the topic, and talk about ten things at a time. At the same time, students must be guided to think and summarize themselves, because what they say directly is often forgotten, and only their own conclusions can be remembered.