Book excerpt: This user-friendly book is designed for language teachers of all levels and languages who seek to inform their classroom practices with current research findings on second language acquisition. Ideal for courses on second language learning and teaching, teacher reading groups, and professional development workshops, each chapter begins with a story of a real teaching scenario and a concise summary of what cutting-edge language teaching research says (and what it does not say) about the topic. Throughout the twenty-one chapters, the authors connect language research to the classroom, challenge misunderstandings around language pedagogy, and provide solutions. Each chapter concludes with classroom activities, and instructional strategies that can be used immediately in professional development workshops or in the classroom. Additional resources are available online to supplement the activities found in the book. Applicable across all languages and levels, this book is suitable for teachers of diverse backgrounds teaching in diverse contexts.