If you are ready to challenge your views and practices about how language is used in English language classrooms, reading this book will provide you with plenty of thought-provoking material to assist you in your endeavours. With each chapter, the authors confront established views of language usage and teaching practice in TESOL. You, like I, may have heard classroom practitioners, managers and academics express strong views about students' first language (L1) usage in class. This volume highlights the need for some commonly held views about second language acquisition (SLA) to be redefined, if translanguaging is to become more widely understood and embedded in TESOL teacher education, research and classroom practices.