Herbart, a famous educator, put forward the phrase "teaching is always educational" and expounded the relationship between teaching and education. Teaching and educating people is the responsibility of teachers, and education is carried out in teaching work. Teachers are also carrying out ideological and moral education while imparting knowledge. Of course, this does not mean that mastering knowledge means improving students' thinking and developing excellent moral character. The key is to see how students receive teaching and master knowledge. In order to help students learn subject knowledge effectively, teachers must walk into the students in real life and stand on the standpoint of students' future development, so as to better help students master subject knowledge, thus realizing the educational value of subject knowledge and students' all-round development, which should also be the ultimate goal of school moral education.