M.O.O.C.s

M.O.O.C.s = Massive Open Online Courses
These are free creditless massive courses offered in partnership with some of the biggest universities in the world.  They offer courses from many different disciplines and in many different subjects.
Some examples are:

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Coursera which started with Stanford and now is in partnership with 62 major universities.

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Edx was started in partnership with Harvard and MIT.

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Udacity was started by Sebastian Thrun of Stanford.  In fact he got the MOOCs started when he introduced his artificial  intelligence course online for free.

CBC's The National had a short documentary about MOOCs yesterday.  Below is the youtube video of it.