In the last decade in particular, the promotion, sharing and use of open educational resources (OER) have been growing exponentially. However, as with any new phenomenon or paradigm, our knowledge of OER’s ramifications and achievements to date necessarily lags behind actual developments. The concept of OER has multifaceted dimensions and implications. For educational institutions, the dimensions are legal, managerial, financial, technical, technological and pedagogical; for practising educators, at stake are ways of teaching that are normative, together with a sense of identity that is both personal and professional. It would be astonishing if research, which by its very nature must be clearly focussed, were able to keep abreast of all such aspects of OER.