I can see how smiling and walking away, although infuriating for students at first, can become a good way to avoid accidentally answering a proximity or stop-thinking question, and thereby a good way to get students to keep thinking. But does it work for all students? Yes and no. It works in that you are not letting them stop thinking. It doesn’t work for all students in the sense that there are students who cannot get past the fact that you have not answered their question. This may be because they are insecure about their own abilities, have learned helplessness, or have a spectrum
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