Free Is Good | Edutopia

"Open educational resources (OER) are found in the public domain and can be used for free for teaching, learning, research, and other educational purposes. These materials can be retained, reused, revised, remixed, and redistributed. These “5R permissions” of OER allow you to not only access the materials and resources free of charge, but also to make them even better. Sounds good, right? But what’s really out there, and why should you use these resources?

There are several examples of OER available, including image and audio resources, books in the public domain, video and audio lectures, interactive simulations, game-based learning programs, lesson plans, textbooks, online course curricula, professional learning programs, and online learning platforms."