Open educational resources (OER) are freely accessible, openly licensed text, media, and other digital assets that are useful for teaching, learning, and assessing as well as for research purposes. There is no universal usage of open file formats in OER.
WIKI: https://en.wikipedia.org/wiki/Open_educational_resources
VIDEO: https://en.wikipedia.org/wiki/File:Turning_a_Resource_into_an_Open_Educational_Resource.webm
WIKI: https://en.wikipedia.org/wiki/Open_educational_resources
VIDEO: https://en.wikipedia.org/wiki/File:Turning_a_Resource_into_an_Open_Educational_Resource.webm