For 20 years, Justin Reich has worked in schools on all kinds of projects: transforming curriculum, integrating technology, re-engaging students, making school meaningful and relevant to young people and families. Across these experiences, every successful school improvement effort has one thing in common: they all improve one step at time. Iterate: The Secret to Innovation in Schools is a playbook for making big, joyful changes in schools out of small, manageable steps. Iterate reflects insights about design, collaboration, and improvement from educators around the world, and from colleagues at MIT. For learning science, new technologies, and innovative theories to make a difference in the world, they have to make their way into the hands of classroom educators. Iterate offers new ideas for improving learning in classrooms, schools, or wherever you work to make learning better.