1. The teaching of lower grades in primary schools is expanded and improved on the basis of consolidating the knowledge of synchronous teaching in schools, and pays attention to the cultivation of students' learning ability and study habits. 2. The study in the lower grades of primary school also lays the foundation for the school selection test in the upper grades of junior high school, so that children can jump out of the inherent learning mode and thinking habits of public schools, measure their learning level with the standards of school selection in junior high school, and establish learning goals.