This document summarizes the agenda for the Educational Content Special Interest Group meeting at the University of Manchester on May 27, 2008. The meeting aimed to discuss what open means for the educational community and move from open source to open content. Presentations were given on creating open content for Wikiversity, the JorumOpen repository, and the RePRODUCE project. A discussion session followed on the challenges and opportunities of openness from technical, pedagogical and practical perspectives.