1. Video: Wikis in Plain English
  2. Video: Vicki Davis Wiki Presentation (from K12 Online Conference)
  3. Why wiki?
  4. Blogs & Wikis for Beginners (slideshare)
  5. Wikis in the Classroom (slideshare)

Wiki Creation Services
  1. PBWiki
  2. Wikispaces - http://www.wikispaces.com/
  3. Wikispaces for Educators (Completely free; no advertising... (better choice for classrooms)
  4. Wetpaint (a really nice tool)