For the last couple weeks I've been working with 8th/9th grade students in their geometry class as they build a life-size replica of The Parthenon atop the Athens Acropolis. It's been a fantastic experience watching students collaborate on such a project. One thing I argued for in planning this project with the math teachers was to give the students part or all of a class to edit their default avatars. They spent the first class making avatars as ugly and as beautiful as they could (this is an all girls school) and I think the investment paid off in their apparent engagement in the project. It's hard learning to use the building tools but they are doing a great job and very proud of it.