Teachers should not only tell students knowledge in class, but also observe students' reaction and acceptance of knowledge at any time. Teacher-student interaction is not as simple as sitting in a chair and asking a question and then asking the students to answer it. Many times, teachers need to observe students' expressions and movements, which belong to the category of interaction. You can't see or see completely when sitting in a chair.

In addition, teachers should attract students when giving lectures. Besides rich knowledge, vivid teaching is also one of the factors. How can it be vivid? Ppt and other things can't solve the problem. Body language is very important. How to express body language when sitting in a chair?

So, if you are a teacher, don't consider sitting in class.

Note: Except for physical condition.