In the university, the head teacher is basically a counselor to manage the affairs of each class, such as asking for leave. Most class teachers have professional titles and occasionally take professional classes. However, on the whole, he knows the situation of the class like the back of his hand. If nothing happens, the head teacher in the university can say that except the monitor, he may not see it several times a year, while the head teacher in high school, like a stay-at-home mother, is in charge of all kinds of things and often sees it.