The defects of college courses, some classes are really unnecessary, and some valuable classes may be boring. Teachers have the obligation to improve students' enthusiasm and interest in class, which is really unbearable for people who watch PPT. In addition, some teachers don't rely on their own ability to attend, but they are speechless when they call the roll.

In short, there must be many reasons for the phenomenon, even if it is not achieved overnight, but if we have to talk about a cause and effect, I personally think it is a school problem.