In the children's learning process, a lot of mathematics knowledge only depends on the teacher's explanation, which is difficult for children to understand and accept. Therefore, teachers need to let the children to practice by themselves. For example, when doing activities in the science zone, the teacher should let the children observe the changes in the growth of plants. They can't rely on the teacher's explanation alone. The children's eyesight can't be seen, and the children need to actually operate and observe to perceive them.