What can you do in a classroom with a wiki? Each of the 50 ways listed in the article below have links to specific examples.
50 Ways to Use Wikis for a More Collaborative and Interactive Classroom from smartteaching.org
The list of 50 ways is divided into the following categories:
* Resource creation
* Student participation
* Group projects
* Student Interaction
* For the Classroom
and each way has a link to *stellar* examples.
I personally like wikispaces because (1) you don't have to be a technical user to participate, (2) a wiki can have few or many members, (3) it can be short- or long-term, (4) wikis can be created (and deleted) very easily, and (my favorite) (5) it's virtually vandal-proof. And (6) you can embed media (video, audio, RSS, etc.), too!
With the Wikispace Plus plan (free for K-12), this is what you get:
* Unlimited users
* Unlimited pages
* Total file storage: 2 GB per wiki (you can create more than one wiki)
* Per file maximum size: 20 MGB
* WYSYG Editing
* Private wikis
Here's the link to sign up for an educational wikispace. http://www.wikispaces.com/site/for/teachers.