This document discusses flipping the classroom, which involves assigning lecture videos for students to watch at home and using class time for collaborative work and problem-solving. It provides examples of how to structure pre-class, in-class, and post-class activities. Key aspects of flipping include repurposing class time for active learning, engaging students through structured activities that integrate online and in-class work, and shifting the teacher's role from "sage on the stage" to "guide on the side." The document also offers tips for implementation such as not over-flipping courses and managing student expectations of the new approach.