1) Classroom interaction includes the patterns of interaction between teachers and students as well as among students. It is important for language learning as it provides opportunities for practice and feedback.
2) Teachers have an "action zone" in the classroom where they tend to focus their attention, such as interacting more with students on one side of the class. Students must also develop "interactional competence" including understanding classroom expectations and when it is appropriate to speak, ask questions, and get help.
3) Different grouping arrangements are used including whole-class instruction, individual work, partner work, and group work. These each have advantages and disadvantages for student participation and language practice.