classroom smart board. Seeking comparison and support of multiple sources of information on phenomena or problems . The data comes from a comprehensive analysis of literature, teaching content, classroom observations, research journals, post-study questionnaires for teachers and students, and interviews.. 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.