edX is a collaboration between MIT and Harvard that offers classes from MIT, Harvard, and Berkeley online for free. In addition to a whole host of classes offered to students all over the world, edX also tracks how students learn online, keeping on top of research that could impact further class offering. This particular institution does award "certificates of mastery" to students who complete certain courses on a higher level; these certificates are free at the time of this writing, but plans are in place to charge for them in the future.
https://www.edx.org/
Udemy differs a little bit from other sites on this list in two ways: first, not all of the classes are free, and second, classes are taught not only by professors but also by people who have excelled in their particular fields, like Mark Zuckerberg (founder of Facebook) or Marissa Mayer (CEO of Yahoo). There are plenty of “learn to code” classes here, but there are also course offerings here like “Product Development Process” (from Marissa Mayer), “Product Development at Facebook” (from Mark Zuckerberg), or iPhone App Design (from the founder of App Design Vault).
https://www.udemy.com/
Coursera is an online collaboration between several of the top-tiered universities in the world, with offerings from a wide variety of programs, anything from Humanities to Biology to Computer Science. Online courses include classes from Duke University, Georgia Institute of Technology, Princeton, Stanford, the University of Edinburgh, and Vanderbilt. For those of you interested in computer science or technology-related offerings, there are classes offered in Computer Science (Artificial Intelligence, Robotics, and Vision), Computer Science (Systems, Security, and Networking), Information Technology and Design, Programming and Software Engineering, and Computer Science Theory. Classes include online lectures, multimedia, free textbooks, and links to other free resources, like online code testers. Registration is free, and you will earn a signed certificate for each class you complete (must complete all assignments and other coursework).
https://www.coursera.org/
OEDb is a comprehensive online education directory for both free and for-credit learning options. We offer up-to-date, detailed program information from accredited online colleges for degree seekers and categorize free online college courses from well-known universities and providers.
http://oedb.org/open/
Berkeley Webcasts is Berkeley's online hub for audio and video classes streamed all over the globe. Search for a specific class or topic, or, use the search menu to look at information by semester or department. You can also look at the list of recently added classes.
http://webcast.berkeley.edu/
Johns Hopkins, one of the world's premier medical learning institutions, offers a wide variety of public health courses and materials. Students can look up classes by course offering title, topics, collections, or images. There are several different ways that courses are presented: with audio, with case studies, core courses for the Hopkins Master of Public Health, and several more. For anyone looking to advance their healthcare career without sacrificing quality, this is the first place to look.
http://ocw.jhsph.edu/
The Massachusetts Institute of Technology was one of the first in the realm of venerated institutions to offer free courses online to anyone who wants to take them. These are all real courses that have been offered at MIT, and there are over 2100 different classes from which to choose from. Classes are available on anything from Architecture to Science and include free lecture notes, exams, and videos from MIT. No registration is required.
https://ocw.mit.edu/index.htm
Stanford University – yes, THAT Stanford – offers an ongoing selection of free courses on many topics. If you’re looking for a basic introduction to Computer Science, you’ll want to check out SEE (Stanford Engineering Everywhere), which is ostensibly for students interested in engineering, but there are quite a few technology-related class offerings here as well. In addition, there’s Stanford’s Class2Go, an open platform for online research and learning. There’s a limited course offering here at the time of this writing, but more classes are planned in the future. Courses include videos, problem sets, knowledge assessments, and other learning tools.
http://online.stanford.edu/courses
There is an astonishing amount of free learning material available through iTunes, from podcasts to interactive classes to educational apps. Dozens of reputable universities have created a presence on iTunes, including Stanford, Berkeley, Yale, Oxford, and Harvard. You’ll have to have iTunes in order to use this program; once you’re in iTunes, navigate to iTunes U (near the top of the page), and you can start to check out the course offerings. Classes are delivered directly to you on whatever device you’re using to access iTunes and are available in a variety of formats: videos, lectures, PDF files, slideshows, even books. No credits or certifications are available; however, the sheer amount of learning opportunities here from world class institutions (more than 250,000 classes at the time of this writing!) more than makes up for that.
https://www.apple.com/education/itunes-u/
We offer nearly 100 full-length courses at the college and professional levels, each of which is available right now — at your pace, on your schedule, and free of cost. Whether you are looking for career advancement, degree completion, professional development, or more casual learning, we have something just for you. At Saylor Academy, you can earn modern, digital certificates of completion; earn tuition-free college credit through our network of partner schools; or even start a low-cost, convenient degree program.
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OpenLearn aims to break the barriers to education by reaching millions of learners around the world, providing free educational resources and inviting all to sample courses that our registered students take – for free!