cMOOCs are based on principles from connectivist pedagogy indicating that material should be aggregated (rather than pre-selected), remixable, re-purposable, and feeding forward (i.e. evolving materials should be targeted at future learning). cMOOC instructional design approaches attempt to connect learners to each other to answer questions or collaborate on joint projects.
xMOOCs have a much more traditional course structure typically with a clearly specified syllabus of recorded lectures and self-test problems. They employ elements of the original MOOC, but are, in effect, branded IT platforms that offer content distribution partnerships to institutions.
