EVANSDALE - Hands go up when Ryan Topliff asks what makes the four blue shapes on the whiteboard trapezoids. He calls on Ana Stewart, who says they have only one set of parallel lines. "OK, I think ...

What, you ask, is an Activboard? It's a kind of high-tech white board, which back in the day used to be called a blackboard, or even a chalkboard. But we've come a long way since chalk. Here's a You ...