The overall teaching design of mathematics unit also includes arrangement and review. The overall teaching of mathematics units usually takes the integration of a learning unit or similar units as the main line. There are generally two kinds of design ideas for review classes. One is organizational knowledge; The second is to focus on ability expansion, supplemented by theme tasks. The former mainly combs knowledge and realizes the structure of unit knowledge. The latter promotes and expands thinking on the basis of reviewing knowledge, with the main feature of improving mathematical ability.