interactive whiteboards pros and cons. With IQClass solutions assisting on the teaching for teachers and students, classes are turned out to be more interactivities and with more fun. While C/S(Client-server) based software IQClass takes care of before , during and after classes, which shows the core value of our educational software, to realize interactivity between teachers and students, education management, tests, tasks allocation and evaluation and others, B/S (Brower server) software IQClass+ makes online teaching possible, and the only thing you need is a networking cable. On the other hand, Returnstar has IQBoard as interactive whiteboard(IWB), interactive flat panel(IFP), document camera, laser projectors, etc.. 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.