.wall sticker whiteboard.Through the demonstration, the visual image is easy to understand, and the students can see more clearly through the scaling tool. This kind of teaching is close to the students' actual life and meets the thinking characteristics of middle school students. It can help students to establish scientific mathematical concepts, break through the difficulties of teaching, and promote the transition of image thinking to abstract thinking. Through the image interpretation of the electronic whiteboard, the combination of dynamic and static, and hands-on participation, the students fully mobilized the various sensory synergies of the students. The students not only understood the ins and outs of knowledge, understood the concept of geometric figures, but also mastered the different graphics. Area and volume calculation formulas, and effectively cultivate students' observation ability and spatial imagination ability.