Master's education (subject-based)

I had the honor to give my masters a class yesterday. I was so excited that I felt very depressed after the lecture!

Description: I'm on the stage, and all of them look very serious. I deliberately say two wrong words, they are the wooden expression; I will talk about two small stories on the subject, and they become intoxicated, but turn back to the theory, let's go back to the state of wood. Let them say a few words about something, all of them are still there! No one spoke to me for two hours.

Feeling: I don't know what's wrong! I already have a master's degree student. It's no difference between my class and my undergraduate students! Don't raise questions in class, no suggestions, no points of view, no discussion! I think there are two problems: 1. Education; 2. Motivation for studying. I don't want to talk about it, but I feel very sad-Why are our senior talents so hard ?!