2: Person to Person

Classroom interaction is simple. It is the talk that occurs in classrooms between teachers and students and among students. It's also a very complex thing in that it is the primary medium by which learning occurs in classrooms, and that's any kind of classroom, be it a history classroom or a math classroom or a social studies classroom. The primary means by which learning occurs is through talk, and for that reason alone it is extremely important.

- Joan Kelly Hall, Professor of Applied Linguistics and Education, Pennsylvania State University