I got into some of the basic codecademy javascript class, and did enjoy it, and also complete CS101 and CS253 in Udacity. That's in Python, so the comparison may not work all that well, but with the videos, homeworks, and forums, I learned a whole lot more from Udacity. As a beginner, I would recommend CS101. Right now Udacity is mostly programming, but in the article they mention a few new classes starting up soon in Math and Physics. Eventually they hope to branch out further and teach everything.