children white board. The integrated use of knowledge , explore the students in the learning process meaningful and valuable experience , to show the students hands-on, brains process and learning conditions of the entire school year , so that students can learn English by improving access to self-satisfied confidence heart , diagnose student strengths and weaknesses , so as to promote the success of students learning English.. 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.