How I Use It
I've used Prezi primarily for multimedia presentations. Students working independently or in groups have created ELA, Social Studies, and Science presentations to share with their parents and classmates. The only downfall is that in order to access and edit the Prezi, you must have the account holders e-mail and password, so you cannot "share" the prezi, like with Google docs.
Prezi is a visually appealing presentation tool. I think Prezi is a nice alternative to power point. Prezi has more backgrounds and features that look better than a simple PowerPoint slideshow. At first, the zoom and wall features can be somewhat confusing for students, but after playing around with Prezi for a few minutes, students get the grasp of the tool. Another downside is that you can't "share" the presentation like you can with a google presentation, so you must have the account holders email and password.