The flipped classroom is a pedagogical model in which the typical lecture and homework elements of a course are reversed.
Short video lectures are viewed by students at home before the class session, while in-class time is devoted to exercises, projects,
or discussions. The video lecture is often seen as the key ingredient in the flipped approach, such lectures being either created by the instructor and posted online or selected from an online repository.
While a prerecorded lecture could certainly be a podcast or other audio format, the ease with which video can be accessed and viewed today has made it so ubiquitous that the flipped model has come to be identified with it.