MOOC's are massive open online courses that are free for anyone to take. They originated in 2008 when a course offered by Siemens and Downes was opened up to a worldwide audience beyond the original 25 enrolled students. There are two main types - cMOOCs which emphasize connections between learners, and xMOOCs offered by universities in partnership with profit organizations. The main purpose of MOOC's is to provide educational opportunities to students regardless of location or ability to pay by allowing them to watch lectures, participate in discussions, and complete assignments on their own schedule.