In primary and secondary schools, the slogan shouted in class is "stand up, good teacher!" " In fact, I undertook the first teaching event in Gagne's nine-paragraph teaching, that is, "attracting attention". The purpose is to let students prepare lessons, take their minds off the class and listen to the class well. In the university stage, because college students have stronger self-study and self-control, they don't need to use this "behavior-driven" way to complete the "attention-attracting" teaching event, but use other ways, such as telling a joke, doing a small experiment, or even omitting it directly (because students have self-control).
As we all know, a good classroom order is an important condition for the smooth progress of classroom teaching and the improvement of teaching quality. However, in our daily mathematics teaching, this kind of guarantee is often lacking. Young students have immature thoughts and poor self-control ability, and often violate the classroom order involuntarily.