Link: Wikispaces for teachers.
I'm new to the world of wikis (other than Wikipedia), but I'm liking what I am seeing. A wiki is essentially an online document in which group members can edit content. David Warlick set up one for a panel preso I participated in at NECC, and attendees were invited to take notes within the wikis. The five presenters collaborated on our presentation using this wiki even though we were located all over the country.
More recently, fellow ADEs recommended Wikispaces to me. I used this during a few staff development with a local charter high school and now I'm recommending it my own colleagues. I didn't realize, until I stumbled upon the blog for Wikispaces today, that the creators are giving away 100,000 adfree wikis to
educators. See the graphic below and spread the word!