1. Maybe the teacher wants the students to listen carefully in class. Otherwise, after he gives you the PPT, you think that you will rely on reviewing for the exam, and you may not listen carefully in class or even skip class, which is not what he wants to see. This kind of teacher may share his PPT with you and provide it for you to learn after all his courses are over.

2. It may be that the teacher's PPT involves some intellectual property issues. Because many knowledge sharing now means that copywriting, documents and videos are only for learning reference and cannot be used for commercial profit. If the PPT made by university teachers involves these related aspects, it has nothing to do with your discussion and study. If you share it with him, he doesn't know what you do with it. If you accidentally infringe, it will have a very bad influence on the teacher.

In addition, the PPT worked hard by the teacher also belongs to his personal intellectual property, and can also be charged. It's just that you are his student and he can't take your money, so he has to copy it for you.

3. It may be that the PPT mentioned by the teacher involves some undisclosed data. In order to promote scientific and technological progress, some teachers will share their research results with their students in advance. Since these scientific research results have not been published, he will worry about the loss of his scientific research results, so he will not give you PPT.

There must be a reason why the teacher doesn't want to give PPT. When I was in college, my classmates basically didn't ask the teacher for PPT, because most of the time the teacher would tell us the key points, so let's take a picture. If we are given PPT, it is difficult to ensure that students will go to the later courses. It is normal for teachers to worry too much. He did it for our grades. Although the university is not strict, it should be able to graduate smoothly.