Preface Case Studies: Open University of Sri Lanka Integrating OER in a Teacher Education Course by Shironica Karunanayaka Indira Gandhi National Open University OER-based Post Graduate Diploma in e-Learning by G. Mythili National Institute of Open Schooling Open Educational Resource Initiative by S.K. Prasad Wawasan Open University Developing a Fully OER-based Course by Mohan B. Menon References Brief Profile of the Editors and Authors