digital whiteboard test. Advantages and disadvantages of whiteboard With the development of multimedia-assisted teaching hardware and software, electronic whiteboard has entered the classroom more and more widely. It is convenient, quick and vivid, adding a lot of color and fun to classroom teaching. Life likes, of course, with the continuous deepening of whiteboard assisted teaching in the classroom, its existing problems are gradually highlighted. What are the advantages of whiteboard assisted teaching and what problems exist in the teaching process? The author talks about the experience in teaching.. 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.