free whiteboard software. While helping students to construct meaning, it also highlights interactivity, strengthens the interaction between students and resources, allows students to participate more in the learning process, and combines resources with teaching ideas, teaching methods, and learning theories. The right is given to teachers and students.. 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.