Here are some great examples of wikis for my future reference taken from:
This wonderful site also has links to many ideas in all curriculum areas.

Technology Integration for Teachers

http://www.techforteachers.net/wikis-in-the-classroom.html

On this site it is explained that "The whole process of this type of technology allows a community of people to share information easily, collaborate, and connect with others with common interests".

It also explains the features of a wiki:

"Features of a wiki:
•  quick definition: webpage with an edit button
•  easy to correct mistakes
•  easy to allow people to contribute
•  does not prevent the making of mistakes
•  “wisdom of crowds” – collaborative (wikipedia)
•  “notification” – asked to be notified when changes occur – that’s how stuff gets fixed in 2 minutes.
•  web 2.0 applications work with old computers - no need to spend money on software"