Mark Dressman is Professor and Chair of English at Khalifa University in Abu Dhabi, UAE, and Professor Emeritus in the Department of Curriculum and Instruction at the University of Illinois at Urbana-Champaign, USA. He has authored four books, including Using social theory in educational research: A practical guide (2008), and more than thirty journal articles on curriculum and the teaching of English as a first and other language. Randall William Sadler is Associate Professor of Linguistics and Director of TESL and ESL at the University of Illinois, USA. He teaches courses on telecollaboration, virtual worlds, and teaching L2 reading and writing and focuses his research on technology in language learning. He is author of Virtual Worlds for Language Learning: From Theory to Practice (2012) and has published in many journals, including Journal of English for Academic Purposes, CALICO, Re CALL, Language Learning & Technology.