All images courtesy of Creative Commons.
Attribution (BY) - NonCommercial (NC)
Attribution (BY) - ShareAlike (SA)
Attribution (BY) - NonCommercial (NC) - ShareAlike (SA)
Open educational resources (OER) are not just openly available and free to download, but are also licensed in a way that allows for their reuse. This reuse option is a very important part of the usefulness of OERs and is frequently referred to as the 5Rs: