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“Open Educational Resources (OER) are teaching and learning materials that are freely available online for everyone to use, whether you are an instructor, student, or self-learner. Examples of OER include: full courses, course modules, syllabi, lectures, homework assignments, quizzes, lab and classroom activities, pedagogical materials, games, simulations, and many more resources contained in digital media collections from around the world.” -OER Commons
OER resources are free to access online, free to share, free to re-use, and typically are share under a Creative Commons License, allowing others to copy, distribute, or revise the OERs for their own purposes.
Sources:
1) Perry, M. J. (2012, December 24.) The college textbook bubble and how the open educational resources movement is going up against the textbook cartel.
2) College Board. (2013). Quick guide: college costs.
3) Florida Student Textbook Survey (2012)
David Wiley speaking at TEDxNYED on March 6, 2010.
Opening the Textbook: Open Education Resources in U.S. Higher Education, 2015-16
Some Facts about Open Textbooks BCcampus
Open Textbooks Could Help Students Financially and Academically. Chronicle of Higher Education (Wired Campus). January, 2014
Open Textbook Publishing Academe, Sept-Oct., 2013