This article shows an experiment on how to use Wikipedia in your classroom. M. Byrne says: “A couple of weeks ago I sent out a Tweet that my students were working on a comparison of Wikipedia articles to articles in their textbooks. Judging by the reTweets and replies to my message, a lot of people were interested in the activity. What I left out of my Tweet was the third part of the assignment in which my students had to locate and use primary source documents to gain more insight into the various topics.”
http://www.freetech4teachers.com/2010/02/textbooks-wikipedia-and-primary-source.html