Alan Hirvela is a Professor Emeritus in the Department of Teaching and Learning at Ohio State University. He is a former co-editor of TESOL Quarterly and both assistant editor and review editor of English for Specific Purposes. He has served on the editorial boards of numerous journals. Diane D. Belcher is Professor of Applied Linguistics at Georgia State University (Atlanta, GA, USA) and a former co-editor of the journals English for Specific Purposes and TESOL Quarterly.

• 1. Introduction: The evolving quest to understand L2 writing teacher expertise Part 1: Accounts of L2 Writing Teacher Expertise Learning Experiences 2. Expertise as collaborative practice 3. Teacher inquiry in ESOL teacher education: Examining how teachers develop L2 writing instruction expertise 4. A collaborative examination of an L2 writing teacher’s expertise learning across teaching contexts 5. Reframing L2 writing teacher expertise to account for ongoing professionalization: Towards a sustainable model of L2 writing teacher education 6. The influence of language learning and writing experiences on L2 writing teacher expertise 7. Reflections on doctoral dissertation writing, mentoring, and advising as a form of expertise Part 2: Classroom-based Studies of Teacher Expertise Learning 8. From routine expertise to adaptive expertise in L2 writing instruction: A case study of an EFL teacher at a Japanese university 9. Instructional expertise in assessing digital multimodal composing in a second language: Conceptual frameworks and teachers’ perspectives 10. A study of expertise in instructional delivery while teaching argumentative writing in an American ESL composition program 11. Navigating expertise in synthesis writing instruction: The role of task representation 12. Afterword