How to make junior high school mathematics classroom lifeless? Sometimes it's the weather, right? Is there any way to adjust it?

This question is simple. You must first blend in with the students and think about some problems from their perspective.

You can tell them jokes for a minute or two before class, and then go to class normally. When you feel that students are not in the state, you can tell them something that students are interested in. For example, you can say: Who do you want to go to? Puppy love is not good! Having said that, I believe they will come back to life soon. From the student's point of view. First of all, a teacher should not be fierce, not keep a straight face, but be kind to students in order to arouse the enthusiasm of learning, otherwise it will only be lifeless. Secondly, don't be angry with the students. Don't let them see what you are angry about. If students do something wrong, you can say it directly, or make everyone laugh with metaphors, and try to turn a blind eye to small mistakes. If you have time, you can also talk about some interesting things after class to improve your enthusiasm. It is also very important that the teaching methods should not be as old-fashioned as the old teachers, but should be novel and innovative, so that students can have a refreshing feeling, thus improving efficiency (I don't know how to do it specifically). There is homework, not too much, as little as possible. You can look at the questions first and choose some necessary questions to do (not to do); And don't put off after class, don't lose heart for a little time, and don't talk about math unless it's math time. In short, think from the students' point of view, let students study happily and easily, and students will also like math teachers and math classes very much.