Book excerpt: In the past few years, the way we think about assessment has undergone a revolution. From the re-organisation of qualifications and examinations at national level (including removing National Curriculum levels at secondary school) to the increasing focus on active research to develop feedback strategies with a measurable impact, assessment has never been so much at the forefront of educational thought. While previously assessment was bound to the curriculum, now there is a demand for schools to develop assessment systems that are merely driven by it. Despite raising serious questions and challenges, these dramatic changes provide a reason for teachers to evaluate their practice. Simultaneously, the nature of CPD has been reinvigorated in the 'digital age', with teachers galvanised by online resources, Twitter and educational blogs. The result? Teachers can take their development into their own hands, and re-professionalise teaching! Bringing together these two movements, this book provides an opportunity for teachers to grasp what formative assessment means, how it complements the curriculum when used effectively, how to employ it in their classroom and school, and how they can improve their assessment systems and practice within the classroom. Divided into two parts, train yourself and teach others, this book will dispel concerns, and help teachers and school leaders to embrace and excel in all areas of formative assessment!