Nearly any topic that youre interested in!

I was truly surprised to see the wide range of topics that Coursera has listed, as well as the many excellent colleges and universities offering the courses! Impressive to say the least, particularly when you can take classes for free or pay a (generally) modest fee for a certificate from the institutions involved. Not too shabby a concept, folks. Granted, free and full-featured would be very nice, but this does cost time, effort and thus money to set up properly. Maybe paid advertising as some reviewers have suggested could help?

JAChristine about Coursera: Grow your career, v2.2.0