digital whiteboard canada. Abstract: Using audio-visual means to teach in classroom teaching can effectively open the gates of students' thinking, stimulate associations, stimulate exploration, and teach for a lesson. Successfully lay the foundation stone, the electronic whiteboard can record and save the whole process of teaching and learning in real time. Teachers can call the classroom teaching materials stored in the computer at any time, no longer worry that the contents of the blackboard can not be reproduced. At the same time, the electronic whiteboard allows teachers and students to be in the classroom. Teaching achieve positive interaction, help improve students' interest, compared with the previous projection screen can only be "static" display content more suitable for teaching diverse and creative teaching . 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.