When a discussion seems to be taking off in several directions, dominated by just a few students, or emotionally charged, stop the discussion and ask students to write either what they saw as the main threads of the discussion or where the discussion might most profitably go. After writing for a few minutes, students will often be better able to identify and stay on productive tracks of discussion. Or, after asking a few students to read their writing aloud, the teacher can decide how best to redirect the discussion.