A wiki is a collaboratively built website based on template driven html pages using free open source online sites. The word 'wiki' is derived from the Hawaiian word for quick 'wiki wiki' - and is so called because it is quick and easy to create and maintain.
Take a look at the short introductory video to wikis from Common Craft.
Take a look at this fabulous site chock full of ideas for using wikis in education.
Take a look at the definition of a wiki in the largest wiki of all, Wikipedia. Then head over to WikiVersity and check out the shared resources available.
Wikiversity is a centre for the creation and use of free learning materials and activities. Its primary priorities and goals are to:
Access this Ementoring Wetpaint wiki and join. Once you have been given advanced permissions as a contributor to the site, please create a page for yourself. On your page, please describe the e-learning strategies that are currently being used in your organisation.
Create a Wikispace for yourself and consider how you may wish to use it for student collaboration in your course delivery.