An important contribution to the emerging body of research-based knowledge about English grammar, this volume presents empirical studies along with syntheses and overviews of previous and ongoing work on the teaching and learning of grammar for learners of English as a second/foreign language. It explores a variety of approaches, including form-focused instruction, content and language integration, corpus-based lexicogrammatical approaches, and social perspectives on grammar instruction.Nine chapter authors are Priority Research Grant or Doctoral Dissertation Grant awardees from The International Research Foundation for English Language Education (TIRF), and four overview chapters are written by well-known experts in English language education. Each research chapter addresses issues that motivated the research, the context of the research, data collection and analysis, findings and discussion, and implications for practice, policy, and future research. The TIRF-sponsored research was made possible by a generous gift from Betty Azar. This book honors her contributions to the field and recognizes her generosity in collaborating with TIRF to support research on English grammar.Teaching and Learning English Grammar is the second volume in the Global Research on Teaching and Learning English Series, co-published by Routledge and TIRF.