Teacher Approval Ends Discussion

After years of classroom research, Dillon (1988) concluded that teacher interventions during student discussions tend to shut down student thinking and student talk. He found this to be particularly true of positive feedback or praise. The rationale, of course, is that when a teacher communicates agreement with one student’s thinking, both the speaker and other classmates conclude that there is no need for further thought because the teacher has gotten the answer he or she was after.