The two teachers admit when they started flipping their classrooms they put everything into video form. Now, they’ve taken a step back and realized some things shouldn’t be in lecture form, and therefore shouldn’t be videos either. Instead, the two teachers have embraced what they call mastery learning, with an emphasis on students taking control of their own learning. Instructional videos are an optional part of a bigger move towards asynchronous learning.
See on blogs.kqed.org