Using Second Life with Middle School

I am working on a Second Life Ed Field trip collection as part of my work on virtual worlds at our school. If anyone has any ideas to add please request to join with a brief message if possible, and I can give you permission edit the wiki.

http://abcinset.wikispaces.com/Educational+Destinations+in+Virtual+...

I am also really interested in how teachers are using the Teen grid with their students. There is so much potential out there.