In September 2008 we gave away our 100,000th K-12 wiki. We know a good thing when we see it so we're giving away another 250,000 ad-free, private K-12 Plus wikis! All the features and benefits that normally cost $50/year - for free. No fine print, no usage limits, no advertising, no catches.

I don't think that Wiki should be used for education- because they can be changed by anybody any time to say whatever.... wikipedia as a source for information is just not reliable.

Most wiki editing access can be restricted to registered users and the edits are monitored and logged in the history file. Because wikis are open and can be edited by anyone (any registered user), they ought to prove more accurate and reliable, not less, than closed resources. A 2005 study revealed Wikipedia (still young at the time) to be nearly as accurate as the Encyclopedia Britannica:

"Wikipedia is about as good a source of accurate information as Britannica, the venerable standard-bearer of facts about the world around us, according to a study published ... in the journal Nature."

Link: http://tinyurl.com/4honf5

Britannica (online) is now catching on to the wiki idea ... and catching up.

I'll add that teachers who are not open to using social media (such as blogs and wikis) raise my suspicion that they may not be keeping 'current' in their profession.