The Chronicle of Higher Education smartly outlines what you need to know about MOOCs (massive open online courses). Great introduction if you are curious about MOOCs and/or looking into what sort of course (and host) you want to take.
KHAN ACADEMY: A free world-class education for anyone anywhere. Khan Academy is an organisation on a mission. We're a not-for-profit with the goal of changing education for the better by providing a free world-class education for anyone anywhere.