It's not that teachers in universities teach most of the time. You just have to listen carefully in class. Why do you want to teach yourself? Of course, if you don't listen carefully in class, you can only achieve a desired result when you study by yourself in the final exam. Then, it is completely responsible for your own actions, state, first of all. Teachers will definitely give you serious lessons, so if you just digest what the teachers have learned in class, it will be enough for your exam, which means the exam is very simple, so don't worry. So, you can prepare yourself well and don't need to teach yourself anything. When you are a graduate student, you may need to teach yourself something most of the time to complete your studies, but if you are an undergraduate, you don't need to teach yourself anything at all. What the teacher gave you is enough for you to finish the exam, and you have already made a difference. Therefore, you don't need to study by yourself, so many useless things, or things that are useless for your exam for the time being. Of course, it's good if you have your own interests and want to study by yourself. Besides, there are many elective courses for you to choose from. You can also take some elective courses in other majors you like, which can improve your employment experience or your cognitive experience. Well, there is also some knowledge. These are all very good, but some of the things you teach yourself are voluntary. You don't have to teach yourself something to complete the exam, so we don't need to teach ourselves something, that is to say, of course it is not necessary. To sum up the knowledge in college, generally speaking, students don't need to teach themselves.