Public Domain, Wikimedia Commons
Open Educational Resources (OERs) are teaching and learning resources licensed for free use and repurposing. OERs can be full courses, software, or any other tool, material, or technique that supports access to knowledge.
Open Educational Resources are broadly considered to meet the "5Rs Framework," meaning that users are free to give attribution to the source and:
OERs are any type of educational material that’s freely available for teachers and students to use, adapt, share, and reuse. They are not the same as public domain materials. Most of the time, someone still owns the copyright, but they have chosen to openly-license the content.
When a course uses free course materials like OER, it can:
To review evidence related to the impact of OER, see Open Ed Group annotated bibliography.