Came across this website recently called Schoolism. It allows you to take a streaming video art course in which the person teaching will also give assignments. You email the assignments to the instructor, adn the they email you back critiques. It's a very interesting concept, and they have some good artists up there teaching. They also have a "self-taught" option for less money which forgoes the ability to get critiques form the instructor and just gives you access to the videos. Though it is quite expensive, it seems like a great resource if your willing to spend the time and money.