cost of marker board. Help teachers to learn from the excellent teaching achievements, and become a prototype for teachers to make courseware that suits their needs, and modify and apply them in a targeted manner. Teachers can also flexibly select appropriate teaching modes according to teaching objectives, teaching objects and teaching content. According to the selected teaching mode, components and theme components are selected to form corresponding courseware, and the multimedia teaching environment is constructed together with the interactive whiteboard software and hardware system.. 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.