Wikis
A wiki is a web application which allows students to add, modify or delete content in a collaboration with others. A wiki invites users to edit any page or ceate new pages iwthin the wiki website.
A Wiki can be thought of as a combination of a web site and a Word document. At its simplest, it can be read just like any other web site, with no access privileges necessary, but its real power lies in the fact that groups can collaboratively work on the content of the site using nothing but a standard web browser. The Wiki is gaining traction in education as an ideal tool for collaborative work.
Review Educational Technology and Mobile Lerning article on "Teachers Guide on the Use of Wikis in Education"