http://elegy.isabellezheng.com/
Not documented because I'm lazy, sorry! :( Much of the information is in the About modal, so just click on that.
A bit more on the code: much of the actual functionality can be found in classapp/views.py, database models are in classapp/models.py and html templates can be found in classapp/templates/classapp.
If you would like to view a sample student or teacher account, the usernames are 'samplestudent' and 'sampleteacher' respectively, and their passwords are all 'password'.