http://techcrunch.com/2010/06/25/aviary-education/?utm_source=feedburner&utm_medium=email&utm_campaign=Feed%3A+Techcrunch+%28TechCrunch%29
This is a very good idea. Teachers can create a "walled garden" for student work, and still get access to Aviary's easy to use suite of Web 2.0 tools.