The Open Educational Resource (OER) movement has been successful in developing a large, global community of practitioners, in releasing high quality learning material and influencing policy. It now stands at the cusp of mainstream adoption, which will require reaching different audiences than hitherto. In this paper, the findings of the OER Research Hub are used to identify three categories of OER user: OER active, OER as facilitator and OER Consumer. These groups have different requirements of OER and thus varying strategies would be required to meet their needs if mainstream adoption was to be realized.
