Provides insight into how to improve the diffusion of OER through (formal) institutional networks. It does so by examining two cases: (1) MORIL - the Multilingual Open Resources for Independent Learning task force, a Network of Practice that acted as a space for sharing and developing institutional OER strategies, and (2) TESSA - The Teacher Education in Sub Saharan Africa programme, an R&D initiative for OER and course design guidance for teachers and teacher-educators working in Sub-Saharan African countries.