digital whiteboard for online tutoring. ????For example, in the study of Mosaic, determine which graphics can be mosaic. This kind of answer is not unique. Using the electronic whiteboard can allow students to freely play the display of a new method after the whiteboard can be restored. Then encourage students to think of other points. As long as the students think correctly, the whiteboard will Give students positive feedback, give students encouragement when they are wrong, and the whole process of the whole process of the student's classification will be recorded, and each team can share the verification. In this way, while consolidating knowledge, the students' divergent thinking has been cultivated to a certain extent, and the teaching of students in accordance with their aptitude has been well carried out, which has improved the timeliness of practice. . 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.