To hear each other (the sound of different voices), to listen to o ne another, is an exercise in recognition. It also ensures that no student remains invisible in the classroom.
Being inclusive is such a vital part of encouraging a healthy and positive learning environment. Teaching should not be run as a dictatorship where the teacher is the only one doing the talking, but the most effective learning happens as a the teacher is also taking input from the students. The idea that students can collaborate not with just each other but with the teacher, not only encourages their confidence, but also allows them to be more vulnerable.