interactive infrared touch board. Establish evaluation gauges, use existing scoring standards, scoring guidelines, and evaluation indicators. After using performance evaluation , body movement intelligence can be a tool to show what the student knows and what to do. Visual space intelligence, linguistic intelligence and interpersonal intelligence are also components of the performance evaluation method.. 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.