1, the book sets up important modules such as learning objectives, background information, content introduction, key summary, reading guidance, problems and difficult notes in preview. It can help children complete preview, review and consolidation in an all-round way, and gradually improve the learning effect.

2. The concept is novel, the focus is prominent, the form is lively, the counseling method is simple and easy, and the exercises and review after class can be directly used to do problems. There is no time to sort out the knowledge points of thinking in class, so we can continue our discussion after class.