Devised in collaboration with the Open University and Macquarie University, Australia, this text is specifically designed for the postgraduate student market, as well as for teachers of English as a second or foreign language throughout the world. This reader includes specially commissioned pieces as well as classic texts, and provides a global perspective on the changing uses and forms of English and its impact on language teaching contexts. Students' skills in analysing these forms will be developed through an examination of the major functional models and their strengths and weaknesses.