For some of the classes my kids were in, the lessons and homework time were reversed.
Learning the material (using the text book and videos) was what they had to do at night and class time was spent working through problems or applying the material in some way.
They’re using flipped learning even in universities now.
Flipped classroom was a popular method when I was teaching math. Some students found it very helpful. The trouble was getting the students to do the reading before class. If students came in unprepared they struggled to keep up.