http://wiki.laptop.org/go/The_OLPC_Wiki
Rafael, the XO is primarily aimed at children, not so much at (presumably) spoiled teenagers and young adults.
As for how the XOs are actually being used, and how the teachers are being involved, you should have a good look at the OLPC wiki. One of the "success stories": http://wiki.laptop.org/go/OLPC_Peru/Arahuay
Biting the hand that feeds IT
