Try a scratch-off

Does the idea of a scratch off bring excitement to mind?  The possibility of winning something or just the intrigue of the unknown is probably whirling through your thoughts.  Let’s add this excitement to a classroom assignment.

Introducing the Secret Message Scratchcard GeneratorScratch to see the thought! (had to move from WordPress, sorry)

Wikispaces is a fantastic source for free educational wikis.  More wiki instructions here.