mastering the material

Teaching is not an easy job. We have to prepare many things before teaching. Firstly, we have to master the material. It is really important. Because by mastering the material, the class will run well. If we do not master the material, the students will get “wrong lesson” and they will not respect us. By mastering the material, we also feel confident because we know what to do in class. Beside that, we should know the situation of the class so that we can handle the class.