"The flipped classroom is just that, a classroom with the times attributed to certain tasks that are flipped. It is not student centered, but just a rehash of sage-on-the-stage direct instruction. The problem with the flipped classroom or student centered learning is that the students dictate the pace. In addition a great deal of learning takes place in group settings with dialog. We do not live in a schedule free world. Most schools have an Advanced Placement or International Baccalaureate curriculum. Both of which have time constraints due to testing. In addition, many schools use SAT testing for college entrance, and classes have to end with a certain amount of learning that needs to take place. Students have a timeline. Allowing students to learn at their own pace could lead to a lot of problems."