Preaching and teaching is an educational method, which mainly helps students to understand and master knowledge, so as to better apply knowledge. In this educational mode, teachers pass on knowledge and skills through explanations and demonstrations, so that students can understand and apply what they have learned. At the same time, teachers will also answer students' doubts, so that students can understand what they have learned more clearly.

Preaching, teaching and dispelling doubts is an effective way of education. In this way, students can not only master knowledge and skills, but also find and solve their own doubts. The advantage of this method is that it can help students build up their self-confidence, enhance their learning motivation and make them enjoy a sense of accomplishment in their studies.

In education, preaching and teaching is not only a teaching method, but also an attitude. Teachers should actively answer students' doubts and encourage them to ask questions. In this way, teachers can better understand students' needs and ideas, and students can express and communicate with confidence. Through this way of education, educators and students can establish a deep communication and cooperation relationship, thus promoting the all-round development of students.