infrared whiteboard with hotkey. English teaching in our country has always had the disadvantages of spending more time and less effective . As the former Vice Premier Li Lanqing pointed out, ??Students learn English from the third grade of primary school , and they will not speak until they graduate from college . This is the failure of English teaching. the reason is , that our country pay more attention to the teaching of English intensive training , mechanical memory and imitation , and the lack of understanding of the basic theory of English teaching, research, effective classroom teaching strategies.. 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.