The giveaway ends January 18, or when the DVDs run out. The website is the social activism arm of Participant Productions, the company behind this film and others including Good Night, and Good Luck, North Country, and Syriana. Teachers can request a copy at this link.
Random trivia snippet: I went to a cool Current.tv event hosted by Al Gore last week in Los Angeles, and at one point Gore told the audience that Inconvenient Truth should have been named "Kill Al Volume 1," because the producers pretty much worked him to death to make and promote the movie. (Thanks, odiyya)
Reader comment: Brent the Closet Geek says,
The guys who run the dating site HotOrNot apparently donated some $25,000 dollars to help get the movie for teachers: Link.