Neil Gaiman linked to this, but I think it's a brilliant idea for a class project. I'm especially interested in what the teacher notes about the whitening of texts. It makes me think about all the Blaise Zabini stories where Blaise was white...or a girl...or both...
http://www.hbook.com/publications/magazine/articles/nov06_almagor.asp
http://www.hbook.com/publications/magazine/articles/nov06_almagor.asp