Constant Leung is Professor of Educational Linguistics in the Centre for Language Discourse and Communication, Department of Education and Professional Studies at King's College London. He also serves as Deputy Head of Department. His research interests include additional/second language curriculum, language assessment, language education in ethnically and linguistically diverse societies, language policy, and teacher professional development. He is Associate Editor for Language Assessment Quarterly and Editor of Research Issues for TESOL Quarterly.

Brian V Street is Emeritus Professor of Language in Education at King's College, London University and Visiting Professor of Education in the Graduate School of Education, University of Pennsylvania. He has a commitment to linking ethnographic-style research on the cultural dimension of language and literacy with contemporary practice in education and in development. Over the past 25 years he has undertaken anthropological field research and been consultant to projects in these fields in countries of both the North and South (e.g. Nepal, S. Africa, India, USA, UK). He has published 18 books and 120 scholarly papers.