What is a Wiki?

A wiki is a type of Web site that allows the visitors themselves to easily add, remove, and otherwise edit and change some available content, sometimes without the need for registration.

Wiki Tutorials 

7 Things You Should Know About Wikis

Examples of wikis 

MoreExamples

PBwiki step by step    

Atomic learning videos for pbwiki tutorials

Wikis - Ready or Not

Wikis in the Classroom - WetPaint's Ideas about Wiki Use in the Classroom

Wiki Wisdom for Educators - Education Week's Digital Directions

TechLearning - Wild About Wikis by David Jakes