For example, when learning the concept of power function, the mathematics teacher must follow several basic stages of mathematical abstraction: The abstraction of the physical level, the abstraction of the semi-symbol level, the abstraction of the symbol level, the abstraction of the formal level, developing Mathematics Concept Teaching. It is clear that if one by one to write these math problems on the blackboard, will take a lot of time, math teachers in the writing process will block the problem, not conducive to students thinking.