Discovery Education is holding a sweepstakes with three grand prize packages. The lucky teacher will receive a class set of computers, a whiteboard, response system and more.
I read the fine print quickly and it looks like you register once, then you can use a twitter account to receive two additional entries per day.
Use http://laterbro.com/ or a similar service to schedule future tweets
Discovery Education is one content provider in the service that you know as KET Encyclomedia.