intodit is a new player to the wiki scene that makes creating your own wiki about as easy as it has ever been.  Intodit is a free and flexible hosted Wiki service that allows users to drag and drop content, including text, graphics, and video with a focus on ease of use. Many users state that they prefer the Intodit Wiki service to others such as Wikispaces because Intodit is user friendlier and provides the best elements of both a Wiki and a social networking service.

If you would like yo get your students to create their own wiki then I'd recommend taking a look at intodit.com