This classroom full of 5th graders is learning all about Native American tribes for social studies. They’ve read books on tribes, drawn maps, taken notes and constructed model huts. But what’s really gotten them fired up is a trivia game that their teacher Mrs. Keadle set up on a whiteboard. The school has had these e-beam edge devices since last year, though teachers are using it much more this school year. It turns ordinary whiteboards into interactive spaces. Costs start at $800.