.buy a whiteboard.The classroom in the context of the new curriculum is not the process of generating teacher's presentation knowledge, but the process of teachers and students jointly generating and constructing knowledge. Generativeness is the highlight of the new curriculum classroom teaching. In the traditional multimedia teaching environment, the courseware is played linearly, which leads the teachers and students to achieve the predetermined teaching goals step by step, even if there are multiple branch choices allowed in a certain link. It is also designed by the teacher in advance. If the student's thinking is inconsistent with the teacher's presupposition, it is impossible for the teacher to modify the courseware. It can only lead the students or pass by. With a whiteboard, teachers can flexibly respond to sudden classroom events. What students can answer, we can show what they are directly; what students need, what we can give immediately. And the generated resources can be directly applied to the next class. It can be said that timely generation is the "soul" of the interactive whiteboard classroom.