Take "cylinder and cone" as an example: the teaching goal requires students to deeply understand the properties of cylinder and cone, so that teachers can deepen students' understanding of cylinder and cone components with practical activities. Ask the students to take out a rectangular piece of paper and try to get a cylindrical barrel by rotating the rectangular piece of paper. When the students rotate, the teacher should guide the students to think about which axis the cylindrical barrel rotates on, so that the students can use their brains in the process of hands-on practice to promote brain development and improve intelligence. After hands-on operation, students understand the components of a cylinder, with a rectangle at the side and two circles at the bottom, which is convenient for students to easily understand the calculation process of cylinder area. Then, the teacher gave each student a small stick, surrounded by a piece of hard paper into a right triangle, and asked the students to stick the right angle edge on the stick by hand. After the students stick it firmly, guide the students to turn the stick and observe the graphic shape after moving. In the process of hands-on operation, students found that right-angled triangles can be rotated to get cones, and they have a certain understanding of the composition of cones. It is convenient for students to study the volume and area of cone after hands-on operation.