Let's share this problem. Some people, after going to college, are like wild horses, fed up with the control of primary and secondary schools. In college, as long as you don't do anything wrong, no one cares about you, including attending classes, so some things are left out of class, and then you start studying by yourself when the exam is coming. In addition, it has something to do with the course. Some teachers just watch PPT, but the contents on PPT are basically books, which won't attract students' attention, so some students choose the right time to teach themselves and do what they want in class. What's more, the teacher speaks too fast to keep up (I am). I just mess it up and read by myself. After all, the knowledge points of college exams are basically the basic knowledge in books, and the books are very thorough. At least the exam is not a problem. So now many college students don't attend classes and choose to teach themselves in their spare time. All roads lead to Rome, and what suits you is the best!