As a teacher, an iPad with a pencil connected to a classroom projector is so much more clean, wieldy, and resourceful than a laptop/smart-board or just using a regular board with markers. The biggest issue is audio, though. Since apple removed the headphone jack on this model, I've pretty much lost the ability to do audio with visuals in most classroom setups I've encountered.
it's not. It's been done before countless times. The only thing that's different this time around is that the usb cable's other end is connected to an ipad