1. Teacher Zheng guides students to master knowledge and promotes students' learning and thinking by explaining knowledge points. It will adopt rich teaching resources and various teaching methods, such as explanation, demonstration and interaction, so that students can acquire a variety of knowledge and skills in their study.

2. Mr. Zheng's teaching content is simple and appropriate, from shallow to deep, focusing on guiding students to think and stimulating students' interest in participating in activities by creating situations. It embodies the teacher's "student-centered" curriculum concept and makes students become the masters of the classroom, so the horse theory class in Zheng Xuan is good.