We have previously covered Prezi as an alternate presentation tool. See the entry "Create Stunning Presentations with Prezi". Educators can now get a free upgrade to the "Enjoy" level (normally $59/year) at Prezi if they sign up for the service with a .edu email address. This service level provides five times the storage space and allows you to create "zoomable" presentations online, present them offline (via the downloadable player), make your content private, and it removes the Prezi watermark.

If you currently have an account, click on the "settings and license" and click the "upgrade" button. After a few steps, you'll be all set.

CCNMTL staff have used this tool for a number of presentations including this one about clickers.