When I've read about flipped classroom, a lot of the instruction is described as teachers working closely with students, given the importance of individualized

When I've read about flipped classroom, a lot of the instruction is described as teachers working closely with students, given the importance of individualized instruction. However, that does also result in a lot of solo learning. If the teacher is working with 25 students for a 50 minute class, that's 2 minutes of individualized instruction per student. Even with the students working with the teacher in groups, you're going to have a lot of students working alone when they're not working in the teacher's group.