1, using tutorial system is the need to change teaching concept and realize student-centered learning. The essence of the change from "teaching plan" to "learning plan" is that the focus of teaching has changed from how teachers teach to how students learn. Guiding plan transforms teachers' teaching objectives into students' learning objectives, changes classroom teaching mode, optimizes classroom teaching structure and improves classroom teaching efficiency. According to the law of understanding from easy to difficult, from outside to inside, from special to general, arrange learning activities purposefully and hierarchically. Teachers should change from starring to directing, walk off the platform, go deep into students, guide students to learn the rules, and let students' learning activities run through the whole classroom.

2, extension before class, first solve the preview study plan, that is, pre-evaluation, about 2 minutes. Teachers know when to preview and what methods and means to let students master their learning objectives, and the effect must be reflected in the classroom.

3. Classroom inquiry, entering the learning stage of classroom guidance plan, lasting about 38 minutes. Implement the four-link teaching requirements. The teaching process is autonomous learning, cooperative inquiry, intensive teaching and consolidation test.