projector wall whiteboard. For example, when I was teaching the course "Pan and Rotate", in order to stimulate students to find translation and rotation in their lives, I used the electronic whiteboard to show students the dynamic pictures, which are the scenes often seen in daily life. And some sports things: trains, elevators, cable cars, propellers, fan blades, in the process of playing animation, I make motion gestures according to the movement of the picture. The phenomenon itself comes from life, it is easy to stimulate the students' attention. At the same time, the teacher's movements and the picture movements complement each other, which triggers the students' desire to participate in the activity and the students' interest in learning is suddenly stimulated. In this process, the students are further guided to observe, compare, and classify, and initially perceive the phenomenon of translation and rotation to form a representation. Then let the students find the translation and rotation phenomenon around them, embody the knowledge from life, and return to life, communicate the connection between mathematics and life, and integrate mathematics learning and life. In this lesson, due to the proper use of the media, it is not difficult to see that students are highly motivated to learn, their concentration is more concentrated than before, and the teaching effect is better. At the same time, the students in the whole teaching process are happy. In this happy mood, the students' understanding ability has been strengthened and the enthusiasm of learning has been promoted. . The IQAio GR519 is an upgraded lightweight version based on the original IQAio GR511. The original dual-cavity structure was changed to a bottom-edge structure, so that the minimalist design accommodates modern classrooms and conference rooms. With one IQProjector V2 and one IQView E3821, you can achieve flexible and intelligent classroom.