Book excerpt: Offering a unique, data-led, evidence-based approach to reflective practice in English language teaching, this book brings together theory, research and practice in an accessible way to demonstrate what reflective practice looks like and how it is undertaken in a range of contexts. Readers learn how to do and to research reflective practice in their own settings. Through the use of data, dialogue and appropriate tools, the authors show how reflective practice can be used as an ongoing teaching tool that supports professional self-development.