This book provides a comprehensive overview of pedagogical grammar research and explores its implications for the teaching of grammar in second language classrooms. Drawing on several research domains (e.g., corpus linguistics, task-based language teaching) and a number of theoretical orientations (e.g., cognitive, sociocultural), the book proposes a framework for pedagogical grammar which brings together three major areas of inquiry: (1) descriptions of grammar in use, (2) descriptions of grammar acquisition processes, and (3) investigations of the relative effectiveness of different approaches to L2 grammar instruction. The book balances research and theory with practical discussions of the decisions that teachers must make on a daily basis, offering guidance in such areas as materials development, data-driven learning, task design, and classroom assessment.