A wiki is a collection of web pages designed so that anyone who accesses the wiki can add to the it in some way.

There are many wikis on the internet and many are designed by and for teachers.
These wikis are used to collaboratively create some very useful and powerful websites.
Some of the wikis I really like are:
**Webtools4u2se.** This is a great tool to introduce teachers to cool tools and what is great about the wiki is that it gives lots of ideas for using the tools. It is designed for school library media specialists, but it is an ideal starting place for all educators. It has a very bright and catchy homepage that is also very informative. It also has a page dedicated to Why Web 2.0 tools?
Tools include all sorts of Web2.0 technologies:
  • audio and podcasting
  • blogs
  • calendars, task management and to do lists
  • drawing, charting and mapping tools
  • news feeds and aggregators (RSS)
  • portal and web page starting tools
  • photo and photo sharing tools
  • presentation tools
  • productivity tools
  • quiz and polling tools
  • social networks
  • video tools and video sharing
  • wikis

CR2.0 or Classroom 2.0
This is another wiki where teachers share ideas and thoughts about classroom activities as well as offering professional developement in the use of Web2.0.
Cool Tools for schools to use
Educational Origami This is a wiki about 21st Century Learning and 21st Century Teaching - how we teach, how we assess, what we teach, when we teach it, where we are teaching it, who we are teaching and with what.
Technology Keys This was created by and for teachers at a US school. They wanted teachers to have important tools at their fingertips
**TL Virtual Cafe** The TL Virtual Cafe is committed to creating transformative conversations about teacher-librarians, educational technology, and collaborative connections to facilitate meaningful and lifelong learning skills.
Getting tricky with wikis Useful tips for getting the best look to your wiki

Maths Wikis
How to make Web2.0 relevant for maths: wiki (a lot of reference links), blogs (discuss problems)
Mathworld http://mathworld.wolfram.com/
Use Del.icio.us to do a search to find using tags; (try maths web2.0 education with wiki or blog to start)