Give the following four points. For example, it is more targeted to find out the knowledge points that children have not mastered, and it is convenient to arrange targeted learning content for children. Secondly, the learning process and results are more transparent, and the knowledge points that children have not mastered will be clearly and transparently reflected in the next learning path. During this period, children will not be prepared for systematic neglect because they are afraid of difficulties. The third is pre-judgment, which knowledge points students have mastered and which ones have not; Predict the knowledge points that students will learn next, and the fourth is continuity. Students will continue to learn along the learning path of the last class every time.