This document discusses Massive Open Online Courses (MOOCs). It begins by defining MOOCs and noting their key features, such as being open to unlimited participants, having no formal entry requirements, and offering no credits. The brief history of MOOCs is then summarized, highlighting the first MOOC in 2008. The document then covers how MOOCs work, their advantages like expanded access, and their disadvantages like lack of interaction. Different types of MOOCs are listed. In closing, the document discusses topics the author would pursue in future MOOCs, like mathematics, to enhance students' skills and understanding.