Open Educational Resources, or OER, are teaching and learning materials that you may freely use and reuse at no cost. Unlike fixed, copyrighted materials, OER have been authored and created with the intention of retain few, if any, ownership rights.
In general, you are able to download a resource, edit in some way and re-post it as a remixed work. OER typically have a Creative Commons license which indicates how the material can be used.
An OER can be a Textbook, Tutorial, Video, Quiz or Syllabus
Visit our Open Education Research Guide for more information