What is a wiki?
A wiki is a website that allows multiple users to edit it's content.
Wikipedia
Wookipedia
This can allow collaboration on a glocal scale..
pbwiki
edu-wiki
wetpaint
Building and Sharing Knowledge
Wikipedia became successful because (among other things) the main goal was to generate public knowledge. We can borrow this model for the education world: to build our subject knowledge base.
Students work to co-write, discuss and co-edit content.
This can be in the theme of...
1) Writing and sharing poetry
2) Creating content based wikipedias (Especially valuable in Science or Social Studies)
3) Co-writing a story or movie script.
4) or more...
Using PBwiki
PBwiki is a online web hosting wiki server. As an educator you can sign-up with pbwiki for free and start developing a very versatile wiki for any purpose.
Get to know PBWIKI task..
Try setting up a pbwiki on a topic for your students.
Here is a link to a "How to" Slide Show. If you want a paper version you can download the ppt and print the slides.