We liked this site not so much because of its direct usefulness in a K-12 setting (although you may find applications to your school or curriculum needs), but because it offers a really cool idea for a class project. That is, how about having your students work on its on digital (fill in the artist’s name here) project?
"A mesmerizing way to introduce children to the Great Masters is through an engaging hands-on activity. After looking at the works of Michelangelo, for example, your child may want to plant herself on her back and paint upside down on a piece of paper taped to the underside of your butcher-block table."
