First of all, we must ensure that every class must be attended, otherwise it is easy to miss the next class, and over time we will give up and stop learning. Secondly, we must establish an unforgettable big framework structure, usually through the teacher's headlines and subtitles, which is enough to establish the content framework of the whole class.
The second is to mark some key and difficult points clearly, and remember some problems that the teacher will repeatedly emphasize during the live broadcast. There is another example given by the teacher. If you can't keep up, you can write a brief overview and make it up after class. Basically, after listening to a course, the framework structure, key and difficult points, and supplementary knowledge points combined with examples are all guaranteed, and a course is basically completed.
For another situation where there is a recording playback after the live broadcast, it can be done in class according to the teacher's ideas. The key point is to pay attention to the teacher's logical thinking mode and problem-solving method. As for the frame structure, you can take notes carefully when watching the playback.