Online Education: Udacity

In addition to Coursera, Khan Academy and MIT online that I've blogged about, I'm near the end of two free online classes from a company called Udacity. The format for both was the same so I don't know if it's a company standard or just chance?

What I liked about the Udacity classes is that lesson topics are 3-6 minutes long with a quiz or exercise associated with most topics to ensure you get the point. There are many topics with about 2 hours of video per week, plus weekly homework assignments. It has been VERY hands-on, you learn by doing and end the class with a working program like a web browser or a blogging website.