The World Science Foundation, a New York-based nonprofit organization most well known for the annual World Science Festival, offers World Science U, a series of multimedia educational resources that may appeal to science and mathematics teachers and students. World Science U consists of three components: Science Unplugged, Master Classes, and Courses. Science Unplugged offers a series of video clips that explain scientific and mathematical concepts in just a minute or two. Hosted by World Science Festival founder Brian Greene, topics of these videos include the Higgs particle, Schrodinger's cat, and string theory. Next, Master Classes features online courses headed by a variety of science experts. These classes integrate recorded lectures, interactive quizzes, animation, and more. These Master Classes are designed to be accessible for "everyone from high school students to lifelong learners." Finally, the Courses section features two longer courses hosted by Greene, designed to be completed over the course of several weeks. One of these courses addresses Special Relativity, the other is entitled "Space, Time, and Einstein." To access these materials, users will need to complete a free registration.