For college, I think the best thing you can do to the whiteboard is to get rid of them.
Honestly, all of the bad professors just stand there writing notes, or worse, copying from the book. That isn't teaching. Teaching is giving us new information in multiple different formats in case we didn't understand the first format. Writing on a whiteboard isn't teaching, no matter how smart the board is. If you want to put a lot of text in front of the students, then hand them the text and ask them to hand write it as homework. Then you can spend the class time actually teaching.
For highschool and younger, I can see a limited point in the whiteboards. But, keep its use limited.