Academic Earth: An organization founded with the goal of giving everyone on earth access to a world-class education.
MIT OpenCourseWare: Free lecture notes, exams, and videos from MIT. No registration required. MIT OpenCourseWare (OCW) is a web-based publication of virtually all MIT course content. OCW is open and available to the world and is a permanent MIT activity.
Study Guides and Strategies: A public service helping learners to succeed since 1996. There is a book version of the Vietnamese section of SGS that was published by Alpha Books.
World Lecture Hall: Welcome to World Lecture Hall, your entry point to free online course materials from around the world. Maintained by the Center for Instructional Technologies, a unit of the Division of Instructional Innovation and Assessment, at The University of Texas at Austin.