This book takes a fresh look at the challenge of setting up educational writing intervention studies in authentic class contexts. In four sections, the book offers innovative approaches on how to conceptualize, design, implement, and evaluate writing interventions for research purposes. Hot topics in the field such as professional development for scaling up writing interventions, building research practice partnerships, implementation variation and fidelity, and response to intervention are addressed. To illustrate the proposed approaches for writing promotion, the book showcases a wide variety of writing interventions from around the world, ranging from single-participant designs to large-scale intervention studies in writing.