- arrangement of furniture in the classroom (desks not in rows)
- presence of group work
- students sharing personal details of their lives with the teacher
I think that is a dreadful criterion - and I would bet a modest sum that students sharing biographical detail with the teacher during class time would be associated with lower achievement, not higher.
I don't want to see students in, say, a U.S. history class talking about themselves.
I want to see students in a U.S. history class talking about U.S. history.