Shoshana J. Dreyfus is a freelance researcher and teacher who currently lectures in the Linguistics Department at the University of Sydney, Australia. Her research interests include discourse analysis, language disorder and academic literacy, in the systemic functional and Sydney School models of language. Sally Humphrey is Senior Lecturer in the Faculty of Education, Australian Catholic University, Australia, and has worked for many years in educational semiotics and TESOL education. Sally is the co-writer of a number of textbooks, which introduce teachers to knowledge about language for discipline learning. Ahmar Mahboob teaches linguistics at the University of Sydney, Australia. Ahmar has worked in the areas of English language learning/teaching, teacher education, identity management, language policy & practice, minority languages, NNEST studies, pidgin and creole languages, Systemic Functional Linguistics, and World Englishes. Ahmar is currently the Editor of TESOL Quarterly. James R. Martin is Professor of Linguistics at the University of Sydney, Australia. His research interests include systemic theory, functional grammar, discourse semantics, register, genre, multimodality and critical discourse analysis. He was elected a fellow of the Australian Academy of the Humanities in 1998, and in April 2014 Shanghai Jiao Tong University opened its Martin Centre for Appliable Linguistics.