whiteboard furniture. The infinite combination of pieces to adapt to the ever-changing teaching needs, it achieves the unity of finite and infinite, the unity of the basic rules and infinite change, the unity of static and dynamic. The "three-piece" thought is the same as the idea of ??integrated pieces. It is a development, connection, and comprehensive view of the problem, which is different from the simplistic teaching ideas of the past. The idea of ??integrable piece is the product of practice development. The "three-piece composition" idea is based on this, combined with the new resource library design idea put forward by interactive whiteboard classroom teaching. It reflects not only the appearance of computer-assisted instruction, but also the result of deep-level geographical processing and abstract generalization based on perceptual knowledge, which has a guiding role in the construction of resource pool.. 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.