This document discusses MOOCs (Massive Open Online Courses) and the role of libraries in supporting them. It defines MOOCs as online courses that are open to unlimited participation for free via the web. While early MOOCs emphasized open licensing of content, later MOOCs rely more on closed licenses and commercial platforms. The document outlines opportunities and challenges for libraries in relation to MOOCs, such as providing resources to faculty, addressing copyright issues, and reaching new audiences. However, it also notes limitations of MOOCs like lack of accreditation, assessment challenges, and limited student-teacher interaction.