SLOODLE

"SLOODLE (Simulation Linked Object Oriented Dynamic Learning Environment) is an Open Source project which integrates the multi-user virtual environment of Second Life® with the Moodle® learning-management system.

Sloodle provides a range of tools for supporting learning and teaching to the immersive virtual world; tools which are fully integrated with a tried and tested web-based learning management system used by hundreds of thousands of educators and students worldwide."

http://www.sloodle.org/moodle/