AARP/National Retired Teachers Association – The American Association of Retired Persons and the National Retired Teachers Association work together to provide opportunities to address the needs of older people as well as the broader community.
American Council on Education – Offers programs and services geared toward adult learners and lifelong learning professionals.
Bookbub – A wide range of free and low-cost books are listed on this site.
Civic Ventures – This nonprofit organization redefines aging as an opportunity for individual and social renewal.
Code Academy – They make learning how to code fun, by making all of their courses game-based in nature. Courses grouped around a particular topic or language (such as JavaScript, HTML, CSS, Python, Ruby, and JQuery, among others). The interactive classes make complicated concepts seem not as intimidating in their collaborative effort to get as many people as possible learning how to code (one lesson per week). Almost a half-million people have signed up for their coding classes.
National and Community Service: Senior Corps– Information on Seniors Corps, Senior Companion, Retired and Senior Volunteer Program (RSVP), Foster Grandparent Program, and other service programs.
Coursera – The many programs offered include Biology, Humanities, and technology-related courses. Interesting classes offered in Computer Science include Artificial Intelligence, Robotics, Systems, Security, Networking, Information Technology and Design, Programming and Software Engineering, and Computer Science Theory. There are online lectures, multimedia, free textbooks, and links to other free resources. Online courses include classes from Vanderbilt, Duke, Georgia Institute of Technology, Princeton, Stanford, and the University of Edinburgh.
edX – This educational resource is a collaborative effort between MIT and Harvard.
Google Code University – Free informational courses on Computer Science, Programming Languages, Web Programming, Web Security, and Google APIs and Tools. Classes are offered via recorded video lectures, talks, problem sets, exercises, documents, and slides. Introductory computer programming language courses include Python, C++, Go, and JavaScript.
iTunes U – Offers more than more than 250,000 educational resources from reputable universities around the world (Stanford, Berkeley, La Trobe, Yale, Oxford, and Harvard). Podcasts, educational apps, videos, lectures, PDF files, slide shows and books are available tools.
Khan Academy – With over 3000 videos from experts in the field, the Khan Academy is an online library of video resources on nearly any subject you can think of or be interested in. Art, algebra, economics, physics, statistics, biology, chemistry, All the courses are self-paced so that you may move along at what you consider a comfortable progression in your studies. The conversational styles of the videos make complicated concepts easier to understand, which is helpful for all educational levels. For each class there are level by level assessments, interactive challenges, and points and badges to measure your progress.
MIT Open Courseware – Massachusetts Institute of Technology offers a wide variety of over 2000 free classes, (all are available to take at your own pace), through online multimedia content, lecture notes, online textbooks, study groups, assignments and exams (an answer book is available if you get stuck).
Oasis Institute - Offers programs in lifelong learning, community involvement and health and wellness to older adults
P2PU – This is Peer to Peer University. It is based upon a shared or collaborative experience as a community of learners. There are several “schools” within the P2PU organizational framework. Courses include WebMaking 101 and Programming with the Twitter API.
Udacity - Here, the selection of courses is all computer science related, and the classes are organized into three separate tracks: Beginner, Intermediate, and Advanced. If you want to learn how to create a search engine in seven weeks, then Udacity is for you. Classes are taught in audiovisual format with quizzes and homework assignments. Certificates are awarded upon successful completion of coursework.
Udemy – Some classes are taught by professors, others by notable people who have excelled in their particular fields [examples include: Mark Zuckerberg (founder of Facebook teaches on “Product Development at Facebook”) or Marissa Mayer (CEO of Yahoo teaches on “Product Development Process”)]. There is even a course offering on iPhone App Design (from the founder of App Design Vault). Not all of the classes are free.
University of Reddit – Free classes are offered in a variety of disciplines and taught by experts in their respective fields. Topics range from art to technology. Depending on who is teaching the class, you may get video lectures, assignments, tutorials, and even collaborative instructional feedback from your classmates.
YouTube EDU – With educational content from many universities as well as NASA, the BBC, TED, and many organizations and businesses, you can visually acquire quite a bit of knowledge and helpful information. There are many tutorials that show you ‘how to’ step by step.
Google search engine has an incredibly powerful search string that will bring up solid first page results. For example, type in your search box: inurl:edu "what you want to learn". This will tell Google to search within the URL keeping the search parameters to only .edu sites, looking for what you're trying to learn.