Book excerpt: Despite the key role played by second language acquisition (SLA) courses in linguistics, teacher education and language teaching degrees, participants often struggle to bridge the gap between SLA theories and their many applications in the classroom. In order to overcome the 'transfer' problem from theory to practice, Andrea Nava and Luciana Pedrazzini present SLA principles through the actions and words of teachers and learners. Second Language Acquisition in Action identifies eight important SLA principles and involves readers in an 'experiential' approach which enables them to explore these principles 'in action'. Each chapter is structured around three stages: experience and reflection; conceptualisation; and restructuring and planning. Discussion questions and tasks represent the core of the book. These help readers in the process of 'experiencing' SLA research and provide them with opportunities to try their hands at different areas of language teachers' professional expertise. Aimed at those on applied linguistics MA courses, TESOL/EFL trainees and in-service teachers, Second Language Acquisition in Action features: · Key Questions at the start of each chapter · Data-based tasks to foster reflection and to help bridge the gap between theory and practice · Audiovisual extracts of lessons on an accompanying website · Further Reading suggestions at the end of each chapter