Book excerpt: The field of English language teaching continues to become more and more complex. To stay up-to-date with the developments as the discipline grows, English language teachers must work to expand their knowledge base by participating in continual professional development and practicing reflective teaching. Farrell provides useful insights about the many kinds of training and discusses the practices you can engage in to ensure your own growth, including team teaching, action research, and teaching portfolios. Learn about the different stages of professional development, what approaches are right for you, and how you can sustain your growth throughout your career.