Interactive Touch Board. While the researchers observe the classroom teaching , they must record the behaviors of teaching and learning. When classifying the classroom observations , it is supplemented by classroom video reproduction of the classroom. The format of the record , as a whole, has two parts , "Factual pen. 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.