Darren Cambridge is principal consultant at the American Institutes for Research in Washington, DC, USA, where he serves as project director for the U.S. Department of Education’s Connected Educators project and advises a range of government, university, and corporate clients on learning technology and professional learning. His team of researchers, developers and facilitators from five organizations provides expert analysis and planning support to build the capacity of federal agencies, non-profit organizations, states and districts to engage in collaborative projects that improve online social learning for educators. His current research focuses on using social network and narrative analysis to inform online community and network management and to measure value creation. He was previously a faculty member at George Mason University, a director at the American Association for Higher Education, and a fellow with EDUCAUSE. On behalf of the Inter/National Coalition for Electronic Portfolio Research, he is third country coordinator for the Europortfolio project funded by the European Union's Lifelong Learning program. He also serves on the board of the Association for Authentic, Experiential, and Evidence-Based Learning (AAEEBL). He has developed technical specifications for the IMS Global Learning Consortium and open source eportfolio software through the Sakai Foundation. His work appears in a range of scholarly journals and books. He is editor of E-Portfolios and Global Diffusion (IGI Global, 2012), Electronic Portfolios 2.0: Emergent Research and Implementation and Impact (Stylus, 2009), and he won the 2012 MacArthur Foundation Digital Media and Learning Faculty Prize for Electronic Portfolios for Lifelong Learning and Assessment (Jossey-Bass, 2010).