I'm taking two Coursera courses at the moment - Calculus One and Pattern-Oriented Software Architectures for Concurrent and Networked Software. I'm very pleased

I'm taking two Coursera courses at the moment - Calculus One and Pattern-Oriented Software Architectures for Concurrent and Networked Software. I'm very pleased with the material and presentation in both, but I don't think I could handle more than two such (relatively difficult) courses at any one time. Codecademy and Udacity allow you to freely dip in and out of lectures and assessments, whereas Coursera courses demand that you deliver quizzes/assignments every week. It's hard to recommend one approach over the other -- with weekly deadlines I find I have more of an incentive to engage in the lectures and course materials, but the added failure conditions can push students to abandon the course.