Wikis are a collaborative tool. Basically, they are websites that allow the users of that site to view, add and maintain the contents of the site. This is a new age for education and wikis are a leading part of the shift to a digital classroom. For a quick introduction into why your should care, see Did You Know and Turning On the Lights.

From a math educator's perspective, you might want to take a peek at This Web2.0 wiki too

Then take a quick look at how wikis change the way information and collaboration work. See Wiki's in Plain English

So, what is a wiki is and how can teachers can effectively use them? A quick introduction to wikis is shown below.

How do teachers use wikis? Here are some examples.

If, after getting acquainted with wiki technology, you envision ways to incorporate wikis into your classroom, you can easily start you own wiki. Read our Wiki HowTo.

Here a link to a site dedicated to education wikis - what they are, how folks are using them. Includes many examples.

For a though provoking idea on using wiki's as dynamic texts, read Wikitexts: Learning Better by Writing the Book

Tutorials and Guides on using wikis in education.