In the last couple decades, one of the most talked about ideas in education has been that of the "flipped classroom"—see for example flippedlearning.org. In a traditional classroom, we receive a lecture on a topic, then get practice in applying the topic for homework. A flipped classroom "flips" this structure. In other words, we watch a video of a lecture at home and then practice and apply the concept in the classroom. The advantage of a video lecture is that one can pause or rewatch sections of a video if one fails to understand, all without time pressure or peer pressure (e.g. not being confident enough to ask a question). The advantage of 'homework' in the classroom is that the teacher can more actively support the students during formative stages of applying a concept and intervene more immediately when needed.