1) Huge variety of courses from the best professors in the world (see Gamification course from Coursera below) or Machine Learning , Human Computer Interaction
2) They are free ( is a mistake)! time is not free.
Also signature courses at Coursera now offer credible tracks for $39, and they have more support.
Why do you as a student need support? because sometimes you get stuck, and sometimes you need human interaction to stay motivated.
3) Coursera- I love these things-
Can run the course faster at 1.75 times ( because seriously I get distracted otherwise)
Can run the multiple language CC (captions) – reading is so much faster
Best feature- in video quizzes
Most number of courses
Makes learning fun
Makes easy to learn language
I wish someone could mash more of Coursera content with Codeacademy gamification and teach hacking and data sciences to the next generation of hackers!!
Rest of the websites are good, but I stick to Coursera and Codeacademy!
5) Education empowers! Every person who learns R or JMP through a free MOOC will create more value for themselves, customers, and their society, country than had they remain uneducated because they could not afford the training.