I love using Wikipedia and use it often, but I never realized it was a "wiki." After learning a bit more about wikis and how easy they are to use, I am thinking about many different ways they can be used in the classroom.
Well, we use interactive journals for science, and there is nothing more interactive than a Wiki. It could be a great way for students to document their findings during science investigations, and then collaborate with eachother. They can get input from classmates, teachers, or anyone at all.
Teachers could also use wikis to collaborate on documents, however, GoogleDoc also served that purpose.