Education through Edubuntu
"Edubuntu is a version of the Ubuntu operating system suitable for classroom use. As an educator you'll be able to set up a computer lab, or establish an online learning environment, in an hour or less -- then administer that environment without having to become a fully-fledged Linux geek." That's what the official website says about Edubuntu.
If you're interested, please have a look at an interesting review about it on Tuxmachines.