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The US Department of Education's defines open educational resources (OER) as teaching, learning, and research resources that reside in the public domain or have been released under a license that permits their free use, reuse, modification, and sharing with others. Digital openly licensed resources can include complete online courses, modular digital textbooks as well as more granular resources such as images, videos, and assessment items.Ìý

OER resources include:

• , sponsored by the Â鶹¹ÙÍø, contains OER curriculum modules aligned with Common Core State Standards
• Ìý- The USDEÌýbelieves in creating an open education ecosystem that involves making learning materials, data, and educational opportunities available without restrictions imposed by copyright laws, access barriers, or exclusive proprietary systems that lack interoperability and limit the free exchange of information.
• , a non-profit sponsored by the Institute for Study of Knowledge Management in Education (ISKME), offers free OER and fee-based services.
• SETDA's on Implementation of Open Educational Resources