price of interactive whiteboards for schools. The ViewSonic?PS750HD?might be better for larger classrooms, as it can project images up to 120" from just 9" away from your screen or whiteboard; with its 3000-lumen output, though, it??s a bit more susceptible to room lighting. In addition to the wall mount and two interactive pens, it includes vBoard interactive software, which enables you to write on, highlight, edit, and otherwise manipulate documents and images in real time. Additionally, it features a PortAll compartment that hides an HDMI port with a built-in micro-USB cable designed to house an HDMI streaming player securely.. 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.