> Is Bloom's "Two Sigma" phenomenon real? ... one-on-one tutoring using mastery learning led to a two sigma(!) improvement in student performance. When I tutored, I found students often had some misunderstanding, somewhere. So my task was to listen , to find that misunderstanding, so I could correct it. This "teaching" is listening, more than talking. The idea is they are lost, but to know what direction they need, I…
I think listening is also valuable because verbalizing a problem often brings up misconceptions or helps internalizing the idea and thus leads to a solution, maybe with a nudge in the right direction if that's expected in a dialog, thus not going the full way.
I had that experience sometimes when preparing a question to ask on-line. Sometimes it becomes clear when trying to see it from the other direction of the listener, or researching the problem space to phrase the question properly yields unexpected results.