"Open education resources or OER for short, are educational resources that have been developed by educators to be shared in the public domain through licenses such as Creative Commons. Some OER resources provide teachers with flexible and high quality tools that help support their changes in instruction and practice in their transition to the Common Core Standards. With these licenses, OER materials can be reused, remixed, or redistributed for new educational purposes and provide an excellent source of meaningful standards-based activities for K-12 teachers.
"This article is a roundup of OER links and communities where educators can find appropriate and vetted materials to help make the shift to Common Core."
Via Jim Lerman