MOOCs began developing in the early 2000s with the theory of connectivism and the first MOOC in 2008 had over 2,000 learners. In 2012, some significant developments occurred including a Harvard MOOC with over 370,000 registered students and the launch of Coursera offering xMOOCs. By 2013, there were too many cMOOCs and xMOOCs to accurately count as the concept continued rapidly expanding.