I suggest that you make a targeted teaching plan according to the subjects you are talking about:

If it is a liberal arts course, the teaching plan should be outlined, not dogmatic, but spread out little by little. The rest will be improvised, and the so-called improvisation is also based on your experience. If you are particularly talkative and live in vain, don't prepare too much; On the contrary, you can give yourself some tips on keywords and sentence patterns as a guide to improvisation;

If it is a science class, it is a little difficult to make it lively, interesting and attractive. You need to thoroughly understand the knowledge points, be able to integrate and be persuasive, and the lesson plans should be well prepared and logically coherent, so that students can understand it more easily.

Of course, the audience is also very important, so there is another way, that is, ask the students who are listening to the class, find it easier to understand and accept how to speak, and constantly revise their own teaching plans.

A good lesson plan must be very important, just like a movie script!

The above is purely a personal opinion, and I don't copy it. I hope it will help you.