Quoted from wiki.org:"Wiki is in Ward's (Cunningham) original description:
The simplest online database that could possibly work.
Wiki is a piece of server software that allows users to freely create and edit Web page content using any Web browser. Wiki supports hyperlinks and has a simple text syntax for creating new pages and crosslinks between internal pages on the fly.
Wiki is unusual among group communication mechanisms in that it allows the organization of contributions to be edited in addition to the content itself.
Like many simple concepts, "open editing" has some profound and subtle effects on Wiki usage. Allowing everyday users to create and edit any page in a Web site is exciting in that it encourages democratic use of the Web and promotes content composition by nontechnical users."1
Watch Dr. Curtis Bonk's short presentation on: Wiki Uses & Applications
You will need to use special software to create your wiki. Here is a list of free, hosted wikis that are easy to use:
Read 10 Best Practices for using wikis in education for some tips from an instructor who uses wikis in the classroom.
Here are some wiki resources on YouTube:
The RUBRIC Project (Regional Universities Building Research Infrastructure Corroboratively) is an example of a large-scale, multi institutional initiative that used a wiki to aid in their collaboration. This project is the subject of the Educause Research bulletin Supporting Knowledge Creation: Using Wikis for Group Collaboration. (pdf)
To begin, let us discuss Wikipedia as a process, not a product. When viewed as a process, Wikipedia can be a powerful tool in the classroom to teach:
The Public Policy Initiative consisted of 10 professors from nine universities teaching twelve courses in the fall of 2010. Students created and edited scholarly articles in Wikipedia on a range of public policy topics. Educause hosted a webinar on January 5, 2011 discussing this program and outcomes. The webinar recording and supplementary materials can be found at: http://www.educause.edu/Resources/WikipediaintheClassroomChangin/220908
More information can be found on the Wikimedia Bookshelf page.
FERPA regulations require that faculty give students a non-public alternative assignment if a student does not wish to post in a public forum. However, if your assignment is on a private wiki tool and not open to the public, then all students can participate.
1 What is a Wiki, http://wiki.org/wiki.cgi?WhatIsWiki. Accessed January 6, 2011.