This document discusses wikis and their use in educational settings. It defines wikis as websites that allow for collaborative writing and editing. Wikis are free tools that can be used by students and teachers for research projects, book discussions, and creating a digital learning commons. The document provides examples of how students in 3rd grade, middle school, and high school have used wikis for sports trivia, research on Darfur, and managing a battle of the books competition. It also explains how school librarians can use wikis as a library website or to communicate with other librarians.