A growing movement that encourages the sharing of open or permissive license educational content such as textbooks, assessments, etc, helping reduce education costs. Many of these materials are licensed under a scheme called Creative Commons.
Creative Commons provides "a set of copyright licenses and tools that create a balance inside the traditional 'all rights reserved' setting that copyright law creates."
Because of the broad sharing environment of the Web, OER materials have become an increasingly popular alternative to classic, copyrighted works. Notable examples include the MIT OpenCourseware and Khan Academy.