Preview before class is essential. University teachers have a fast pace of class, and sometimes they have to teach more than half of the books in one class. Although different majors have different rhythms, what everyone has in common is that the course content is thick, there are many knowledge points and it is difficult (compared with middle school). Therefore, it is difficult to adapt to the new university. We should treat it positively, work hard to overcome it and never give up. It is very important to listen in class. Listening is not only listening to the teacher's ideas, but also the focus of listening and learning. Time is limited, only effective efforts can get the results you want, so you must know which are the key points. Consolidate the vacancies after class. Class time is limited, so I have to watch myself resume after class. At this time, the library is a good place. Making good use of existing resources and reading more reference books can not broaden our horizons and deepen our understanding of what we have learned. Regular review is the key. The most famous Ebbinghaus forgetting curve has scientific basis and must be reviewed regularly. Learning is a repetitive process.