What are Creative Commons Licenses?
Creative Commons licenses allow creators to give others the right to use their work, and to choose which restrictions (if any) they want to place on that use. It's like granting copyright permission in advance. The licenses range from the completely unrestricted CC0 license, which allows anyone to do anything with the work without giving credit for it, to the Attribution-NonCommercial-NoDerivs license (CC BY-NC-ND), which requires attribution and prohibits derivative works and commercial use. Open educational resources often have the simple Attribution license (CC BY), which allows users to distribute, remix, and adapt the work, even for commercial purposes, as long as the creator is given attribution.