Interactive whiteboards are front and center in college classrooms — from edtechmagazine.com
A look at whiteboards at New York’s Touro College.

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From DSC:
We currently have 3 types of Interactive WhiteBoards (IWB’s) on our campus:  Epson BrightLinks, SMART Boards, and/or an Eno Board from PolyVision.

However, the idea of using mobile interactive whiteboards is becoming increasingly popular — i.e. being able to annotate on an iPad, for example, and having everyone in the class see these annotations.  I’ve seen some K-12 folks use Apple TV for this type of thing, but Apple’s multi-cast wireless protocol doesn’t work as well for us in a campus environment.  I’ve also seen/heard of people using one of the following solutions listed below as well. (I wish I had more time to check each of them out, but I’ll simply list them for you here.)