In practice, it is relying on one's own cultural background, that is, "accumulating a lot of hair", to change expressions, eyes, gestures and intonation in class, to fully show the teacher's understanding of the text taught and the "educational wit" sprouted with the teaching emergencies caused by students' learning activities.

I have just given classes to several schools, and I hope it will help you from my own practical experience.

In fact, the real free and easy teaching attitude comes from the in-depth grasp of teaching materials, rich classroom experience and self-confidence.