Book excerpt: Designed for pre-service teachers and teachers new to the field of ELT, What English Teachers Need to Know Volumes I, II, and III are companion textbooks organized around the key question: What do teachers need to know and be able to do in order for their students to learn English? In the Second Edition of Volume I, Murray and Christison return to this essential question and call attention to emerging trends and challenges affecting the contemporary classroom. Addressing new skills and strategies that EFL teachers require to meet the needs of their shifting student populations who are impacted by changing demographics, digital environments, and globalization, this book, which is grounded in current research, offers a strong emphasis on practical applications for classroom teaching. This updated and expanded Second Edition features: a new chapter on technology in TESOL new and updated classroom examples throughout discussions of how teachers can prepare for contemporary challenges, such as population mobility and globalization The comprehensive texts work for teachers across different contexts—where English is the dominant language, an official language, or a foreign language; for different levels—elementary/primary, secondary, university, or adult education; and for different learning purposes—general English, workplace English, English for academic purposes, or English for specific purposes.