Creative Commons licenses enable authors, creators, or any owner of copyright to allow their works to be used by others as long as attribution (the BY part of the license) is included. Creative Commons licenses, with the exception of those that include ND (No Derivatives), qualify a work as being an open educational resource, allowing for Use, Reuse, Redistribution, Revision, and Remixing.  

"Decoding Creative Commons Licenses" by Cailean Cooney is licensed under a CC 4.0 License and remixed from a work by Nicole Allen.