Interested in integers? Fascinated by fractals? The MIT OpenCourseWare Mathematics website can assist you with your quest for knowledge where visitors have access to all of the materials this institution has contributed over the past few years. Users will note that there are over four dozen courses here, complete with syllabi, lecture notes, and even in some cases video lectures and other audio visual materials. Browse through the Featured Courses to learn about some of the most recent offerings, which include, "Nonlinear Dynamics I: Chaos" and "Category Theory for Scientists.” Additionally, users can sign up to receive updates when new materials are added to the site.