Creative Commons is a free licensing system that allows the author of a work to specify how that work can be used by others. Even though the author retains full copyright, the Creative Commons license gives others the legal permission to copy and use the work. Works that have a Creative Commons license can usually be identified with one of the licenses displayed in the graphic below. For more information about the different licenses, see Creative Commons.
Creative Commons Licenses are necessary to ensure that content is freely available for the 5Rs of Open Education - revise, reuse, remix, redistribute and retain. These permissions allow you to download material, tailor it to your needs, save a copy, and share it with attribution.