First, the contents of some courses are boring for most college students, so they become water courses. This type of course is more common in the period of freshman and sophomore. Most of the water courses recognized by college students are Mao Zong, Marx and other four theories, mental health education, history and so on.
For schools, there are certain reasons for arranging such courses, but for students, on the one hand, it is of little use for their major, on the other hand, the content is not very interesting. Therefore, in this kind of class, students all want to skip class. The teacher is strict and can't skip class, so I will do something else in class in the hope of being admitted. Of course, some students are interested in this aspect, so these courses are not water courses for them, but courses that they are looking forward to every day.
Second, the teacher doesn't teach well enough, so it doesn't matter whether you take this course or not. This is also a kind of water. Sometimes the water course is not attractive enough, and the specialty is not targeted enough, but the teacher in charge of teaching is not very good.
Sometimes it is because the accent is too strong, and sometimes the teaching method is unacceptable to individuals. Such a course becomes a water course. If you finally master better than the teacher after self-study, then you can choose not to attend classes, do other things, or skip classes directly.
So there are not many water courses in universities. A thousand people have a thousand different opinions. If you really want to know, you still have to experience it yourself.