touch screen whiteboard. Based on teacher interviews, student interviews, and understanding of the teacher's perception of the model , try to support the factual material. Therefore , I have also designed a questionnaire for investigating teachers and students' views on classroom teaching , hoping to provide as much as possible. 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.