MIT OpenCourseWare, a free online education initiative, was launched in 2002. Starting with 50 courses, by 2007 the university had posted over 1,800 courses in 33 academic disciplines. This revealing undergraduate module, based on a class taught by four MIT professors in 2012, focuses on the fundamental physical processes that shape climate. The course also covers evidence of past and present climate change, an overview of climate models, and discussions of climate change consequences. Navigating the system is easy. Begin with the Course Home page; then look over the Syllabus and Calendar before browsing the Readings, Lecture Notes, Assignments, and Projects.