The last few decades have seen an exponential growth in the use of task-based language teaching (TBLT) around the world. Departing from the traditional approaches to language teaching, TBLT offers the opportunity for natural language learning in instructional contexts through the use of authentic and meaning-oriented tasks. This book aims to offer a unique contribution to the expanding literature on TBLT by reflecting current progress in the domain as well as underlining future directions in research and theory. Essential reading for learners, teachers and researchers, the book provides comprehensive coverage on the key elements of TBLT. A fairly wide range of topics such as the rationale for using TBLT, task design, task implementation, and task evaluation is covered in this book. Thus, it is designed to enhance pre-service and practicing teachers' knowledge about TBLT and outline some new directions in which the field should move if it is to fulfil its purposes.