Open Education encompasses resources, tools, and practices that are free of legal, financial, and technical barriers and can be fully used, shared, and adapted in the digital environment. Open Education maximizes the power of the Internet to make education more affordable, accessible, and effective.
(Scholarly Publishing and Academic Resources Coalition)
OER Impact Adoption Calculator - The OER Adoption Impact Calculator clarify many of the potential impacts of adopting OER versus traditionally copyrighted materials.