A MOOC is a massive open online course that is available for free to anyone with an Internet connection. There are two main types of MOOCs: xMOOCs, which are typically offered by universities in partnership with for-profit organizations and focus on recorded expert lectures, and cMOOCs, which emphasize connecting learners and are built on platforms envisioning social connectivity. MOOCs first emerged in 2008 from a course on connectivism and connective knowledge that had 25 tuition-paying students but was also taken online for free by over 2,300 others.