good quality whiteboard. The basic material in the teaching resource library is diversified and multimedia. Therefore, the component library consisting of ??components?? is a multimedia component library, similar to the multimedia teaching database in the ??integration?? thinking. The component library uses spatial pixels such as text, graphics, and images, and space-time elements such as audio, animation, and video to express knowledge points, and organizes material materials to construct a resource library according to certain retrieval and classification rules. The expression of the "component" in the component library is multi-level, multi-angle and multi-sided. For example, when a teacher teaches Zhu Ziqing's famous prose "Back", when referring to the author, it is necessary to use Zhu Ziqing.. 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.