I have been aware of this chalk board facility (it’s not an app, so it’s free!!!) for a while, and is certainly a site worth bookmarking within your favourites. Go to http://chalk.37signals.com/ on your iPad, and you will see a couple of chalk sticks, an eraser and, when you click the arrow, the option to press and save your completed work to your library. If you use a browser that allows VGA output (and you have a VGA adapter) then this nice little site will allow you to share via projector etc. The site works nicely if you have a stylus.
chilledteaching 