Children are the main body in the process of education and teaching, and teachers are the organizers, bridges, guides and collaborators of classroom and life activities. Teachers teach students in accordance with their individual differences in education and teaching, so that each child can be fully developed and promoted on the original basis; Pay attention to each child's learning process and cognitive ability. In the classroom, we should not only pay attention to the development of children's ability of observation, analysis, self-study, expression, operation (hands-on) and cooperation with others, but also pay attention to the development of calculation, spatial concept, statistics and problem-solving ability, and also pay attention to the healthy and harmonious development of children's emotions, attitudes and values. We should not only pay attention to children's academic performance in classroom teaching, but also pay attention to children's thinking form and thinking ability in the learning process.