A practical guide to prototyping as a way to revolutionize your work and creative life, from Stanford University's world-renowned Hasso Plattner Institute of Design, aka the d.school. Prototyping is a way to test an idea to see if it can be successful before investing too much time and too many resources. But it's not only designers who "prototype" as they work. A skateboarder tries a new trick; that's a prototype experience. A chef experiments with a new dish and new ingredients; that's a prototype experience, too. Once a prototype is made, the creator gains knowledge about what worked and what didn't, what should be used again and what should be trimmed from the experience. This is a book about becoming better at prototyping by building things and experiences that will help you learn from your attempts, no matter what you're aiming to achieve. Readers will learn how to not only create prototypes but also how to reflect on the success and failure of those attempts. Scott Witthoft, who teaches courses in design and prototyping to students around the world, introduces a comprehensive number of tools and materials for prototyping, including digital platforms and physical objects. And he breaks down real-life examples of prototype experiments with accompanying photographs for the reader to observe large- and small-scale prototyping in action.