MIT OpenCourseWare
Free and open publication of material from MIT courses across the entire MIT curriculum, from introductory to the most advanced graduate level. Each course includes a syllabus, instructional material such as lecture notes or a reading list, and learning activities such as assignments or exams; many also have complete video lectures and free online textbooks. There is no signup, no enrollment, and no start or end dates, and MIT offers no credit or certificates for using OCW.
Good for: Students who want to go beyond school material, especially in mathematics, science, and engineering.
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Open Yale Courses
Free and open access to a selection of introductory courses taught by Yale University faculty. Lectures were recorded in the Yale College classroom and are available in video, audio, and text transcript formats. Registration is not required, and no course credit, degree, or certificate is available through the site.
Good for: Students who enjoy full classroom lectures in the humanities, sciences, and social sciences.
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Carnegie Mellon Open Learning Initiative (OLI)
Interactive online courses built around learning by doing: clear learning goals, practice with immediate feedback, and built-in hints when you get stuck. Full courses can be used as they are, or modules can be remixed. Check OLI's site for current access terms for independent learners.
Good for: Students who learn best by practising with feedback, especially in science, statistics, and computing.
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edX
Free online courses from universities and institutions around the world, in subjects including law, history, science, engineering, business, social sciences, computer science, public health, and artificial intelligence. Courses can be audited for free; a verified certificate is available for a small fee on many courses.
Good for: Students exploring university-level subjects or career skills at their own pace.
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Khan Academy
Free online learning resources from a nonprofit: short instructional videos paired with interactive practice exercises, across mathematics, sciences, history, literature, economics, and computer science, with test preparation included.
Good for: School students of all ages — particularly useful for daily maths and science practice.
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Coursera
Online courses from top universities and companies. Many courses can be audited for free so you can watch lectures and read materials; graded assignments and certificates usually require payment, so check each course page for its current terms.
Good for: Students who want structured university-style courses with a schedule and assessments.
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