This document discusses exploiting open educational resources (OER) for professional development. It defines OER as teaching, learning, and research materials that can be freely accessed, used, adapted, and redistributed with few or no restrictions. The 2017 Ljubljana OER Action Plan provides recommendations in five areas to support wider adoption of OER, including building user capacity and ensuring inclusive access. The document also reviews UN frameworks supporting education rights and OER, and lists ways that OER can enhance professional development, such as inspiring innovation, expanding learning networks, and strengthening abilities like collaboration. However, it notes challenges like lack of awareness, incentives, time and issues around quality and mindsets.