A MOOC (Massive Open Online Course) is an online course aimed at unlimited participation and open access via the web. MOOCs are open to anyone without charge, use online materials and resources, and typically do not have prerequisites or provide academic credit. The document provides a brief history of MOOCs, noting their origins in open education and connectivism. It outlines the pros of MOOCs such as being free, improving lectures, and connecting people globally. Cons include difficulties with discussion, grading, and dropout rates. The author expresses interest in using MOOCs to improve photography and math teaching skills.