In the course of a lesson, a teacher might ask herself/himself:
-How do I know when it would help to wait, rather than ask a question or volunteer more information?
-When should I summarize in order to move on, and when should I encourage my students to play out their thinking?
-How do I judge whether to probe for a misconception, or let classmates be responsible for sense-making and validation?
There are no easy answers to such questions. The Math Forum's Bridging Research and Practice group highlights several elements that influence teacher's decision-making: balance, wait-time, and classroom norms. Read more about each one here: