Within the bounds of Creative Commons licensing there are 5 key points to consider when using OERs:
1. Reuse - Content can be reused in its unaltered original format
2. Retain - Copies of content can be retained for personal archives or reference
3. Revise - Content can be modified or altered to suit specific needs
4. Remix - Content can be adapted with other similar content to create something new
5. Redistribute - Content can be shared with anyone else in its original or altered format