There are really many different places in college. For example, being late is not a terrible thing, the teacher probably won't say anything, at most criticize you a little, the risk of the score being deducted is very small, even if the score is deducted, the deducted score in the final grade is very small, you will not be punished, less afraid, and the natural consequences are few. Before, being late was really scary. I don't know why the teacher pushed all the students including me so hard. The teacher will want you to have fear in your heart. For simulation purposes, if you're late for work, things don't have to be that bad, and most work doesn't end at 10pm. I also don't think the teacher is doing that to simulate something. I think, on the one hand, all teachers do that, so the next teachers do it out of habit. On the other hand, the teacher will believe that if he punishes the students less harshly, then all the students will soon give up more learning. I don't know why he didn't choose to stop it when it really happened. Perhaps he was too busy to bother to do that way. Perhaps he thought it would be too late to stop this kind of thing when it happened, because two or three weeks, or even three or four days, were valued by him. But that doesn't explain why elementary school teachers do the same. There are indeed students in elementary school who do terrible things, they bully others, or destroy other people's things. But the crux of the matter is that it doesn't matter if he's late. Severely punishing students who are 10 minutes late does not make students not go to the neighborhood near their home after school to destroy items.