[https://www.apple.com/apps/itunes-u/ iTunes U] "The free iTunes U app gives you access to the world's largest online catalog of free education content from leading institutions -- on your iPad, iPhone, or iPod touch."
[https://www.khanacademy.org/ Khan Academy] 'Khan Academy offers practice exercises, instructional videos, and a personalized learning dashboard that empower learners to study at their own pace in and outside of the classroom. We tackle math, science, computer programming, history, art history, economics, and more. Our math missions guide learners from kindergarten to calculus using state-of-the-art, adaptive technology that identifies strengths and learning gaps. We've also partnered with institutions like NASA, The Museum of Modern Art, The California Academy of Sciences, and MIT to offer specialized content.'Khan Academy is utilized in many classrooms and offers an additional feature that allows you to "coach" other students and allows you to monitor their progress and see in which areas they are struggling or striving.
[http://ocw.mit.edu/index.htm MIT Open Courseware] "<span style="color: rgb(51, 51, 51); font-family: arial, helvetica, sans-serif;">Through OCW, educators improve courses and curricula, making their schools more effective; students find additional resources to help them succeed; and independent learners enrich their lives and use the content to tackle some of our world’s most difficult challenges, including sustainable development, climate change, and cancer eradication."</span>
[http://online.stanford.edu/about Stanford Online] “Stanford Online offers a variety of professional education opportunities in conjunction with many of the University’s schools and departments. We also offer an array of free online courses taught by Stanford faculty to lifelong learners worldwide.”
[https://www.uclaextension.edu/pages/search.aspx?c=free+courses UCLA Extension] <span style="font-family: arial, helvetica, sans-serif;">"<span style="line-height: 14.8828px;">As one of the nation’s oldest, largest, and most comprehensive continuing higher education providers, UCLA Extension gives you all the options and a wide range of courses you need."</span></span>
[https://www.udemy.com/ Udemy] “Today, 2 million students in 190+ countries are taking online courses on Udemy. They’re learning Programming, Yoga, Design, Photography, Spanish, Marketing, Guitar, Finance, Cake Decorating, and so much more. More than 12,000 courses (in 10 different languages!) have been published in our marketplace. Each course is designed & taught by an expert instructor and hundreds of new courses are published every month.”These courses require a small fee to access their content.
[http://webcast.berkeley.edu/series#c,s webcast.berkeley] "webcast.berkeley is UC Berkeley's central service for online video & audio for students and learners around the globe."This site requires a Berkeley login to access its content. Free content can be found on edX or iTunesU.
[http://oyc.yale.edu/ Open Yale] "Open Yale Courses provides free and open access to a selection of introductory courses taught by distinguished teachers and scholars at Yale University. The aim of the project is to expand access to educational materials for all who wish to learn."