The more complicated the content, the more you need to preview it in advance, which is the advice that all teachers will give to students. The role of preview is to familiarize students with new knowledge points in advance, so that they can easily keep up with the teacher's rhythm in class. Secondly, students will encounter all kinds of problems in the process of contacting the contents of new chapters, which can be recorded in advance and then taken to class with these problems, which can often get twice the result with half the effort. So how can we review effectively in college classes? You can follow the following three steps.

First, get familiar with the content of the textbook in advance. Preview? The first thing to do is to be familiar with the teaching materials. In the process of contacting the textbook content, students have a certain understanding of the new chapter knowledge to be learned next, so that they will not be in a hurry in class in the future. However, being familiar with the textbook is not just a matter of going through it, so there is basically no difference between reading it and not reading it, because you can't remember it in the end. Generally speaking, it takes at least two times to start. The first time, let yourself have a preliminary impression of the new knowledge and probably know what to say. The second time, you need to be careful and patient. Students must think and analyze according to the content structure of the textbook. Only when you have a certain understanding of new knowledge can you preview and achieve your goals.

Second, use counseling books to deepen learning. Even if students are familiar with the contents of textbooks in advance, students' mastery of new knowledge always stays at the simplest stage. At this time, reference books are needed to assist learning. Because every concept or formula has many derivatives, textbooks can't cover everything. At this time, learning by comparing textbooks and tutorials can help students master new knowledge points to the greatest extent. The whole stage can not only consolidate the previous preview results, but also enable students to understand the new content more thoroughly and remove most obstacles for the next course.

Third, summing up problems and recording them can't be smooth sailing, and knowledge can't be your own business just by reading textbooks, so you will definitely encounter various problems in the preview process. For example, I don't understand the textbook when I am familiar with it, and some explanations in the tutorial are too blunt. It is necessary to record all these questions here and pay attention to the teacher's explanation when listening to the class, so that the efficiency of listening to the class will become very high.