It started with a simple observation: Students need their teachers present to answer questions or to provide help if they get stuck on an assignment; they don't need their teachers present to listen to a lecture or review content. From there, Jonathan Bergmann and Aaron Sams began the flipped classroom: Students watched recorded lectures for homework and completed their assignments, labs, and tests in class with their teacher available. What Bergmann and Sams found was that their students demonstrated a deeper understanding of the material than ever before. This is the authors' story, and they're confident it can be yours too. Learn what a flipped classroom is and why it works, and get the information you need to flip a classroom. You'll also learn the flipped mastery model, where students learn at their own pace, furthering opportunities for personalized education. This simple concept is easily replicable in any classroom, doesn't cost much to implement, and helps foster self-directed learning. Once you flip, you won't want to go back!