Interactive whiteboard (Macbook and iPad)

If you would want to use an iPad as an interactive whiteboard, you need to pair up your iPad and your Mac laptop. They make a great couple!
You might want to try "Splashtop", which includes "streaming" software for your Macbook, in combination with an iPad app.

http://support-whiteboard.splashtop.com/entries/20164301-introduction-and-launching

Integrated in the iPad app is the ability to remotely control your computer (which is connected to a classroom projector).
The App gives you the extra interactive annotation possibilities, and screenshots can be made at any given moment.

Who said they wanted this expensive interactive whiteboard . . .?