Ready-to-use CDs and DVDs mostly for education

Here http://linuxtracker.org/account-details.php?id=26 are a pile of CDs and DVDs that I have gathered from around the Internet. I believe them all to be freely redistributable and mostly GPL-licensed; let me know if you find any reason to think otherwise. They are all built to run on PC-type machines; anything from a laptop through a desktop to a server cluster would be fine. Almost anything typically donated to a nonprofit and manufactured in the last 8 years or so would probably do.All are set up so you can 'boot' them (no hard disk required), or you can let them 'autorun' under Microsoft Windows. They are rather slow when autorunning under Microsoft Windows, but that's a reasonable way to learn what they do, if you don't want to or don't know how to boot your machine from CD. When you have finished with one of them, you take it out and the machine is exactly as it was before you started.There's a lot of games and educational material; I'd suggest starting withhttp://home.btconnect.com/chrisandcarolyn/Santas-Favourite-Linux.pngandh... an introduction.Things like http://home.btconnect.com/chrisandcarolyn/knoppix4.0-for-windows.pngare quite ambitious; to my mind, in no way inferior to anything you might pay money for.