Open Education Resources (OERs) are resources that are available for free use.  Typically you are free to retain, reuse, revise, remix, and redistribute OER content (these are known as the 5 Rs); however some licenses have different restrictions. Generally, OERs are licensed under creative commons licenses; some of these licenses include CC, CC BY, CC BY-SA, and CC BY-NC.  Click here to learn more about the different licenses.