interactive whiteboards for home use. Epson??s?BrightLink series?of short- and ultra-short-throw interactive projectors make a good choice for educational use. The?710Ui, for example, uses a laser light source to output up to 4000 lumens of brightness, with image sizes up to 100", making it suitable for use in most classroom settings. With its 0.22 to 0.44:1 throw ratio, you can use the included wall mount to install the 720Ui directly above your screen or whiteboard to virtually eliminate the possibility of shadows being cast onto the screen when projecting, and protect the teacher??s eyesight in the process. Two interactive pens are also included to jump-start the learning process.. 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.