One hot topic in education circles this fall is using the iPad as an interactive whiteboard.
Oh - the days of teacher's pets getting to clean the blackboard erasers are long gone.
An interactive electronic whiteboard is a very expensive piece of equipment. But with modern hardware we have seen the price point drop dramatically. With a bit of hacking and mash-up skills the do-it-yourselfer can create a comparable system for $30 - $100.
Johnny Chung Lee's Wii Remote Whiteboard software.
Now the iPad has gotten into the mash-up game. Using various software tools one can share a Mac/PC whiteboard program and then use the iPad as a second visual screen that is remote and a user input device. The portability of the iPad lends itself to the classroom where the students may interact with the projected (or large screen) image in real time.
With iOS 5 coming this fall, Apple will update Air Play, allowing any iPad display to be shared with another display (via Air Play & Apple TV).
For one case study see "iPad as an Interactive White Board for $5 or $10" by Wesley Fryer.
Or see iPads in Education web site.
Some of the related tools are: Air Display, Doceri, eNote Taker, Ink2Go, ShowMe, ScreenChomp, Splashtop, Replay Note