I started to get my thoughts down for the aforementioned rubric. It came out as a checklist. Here’s what I have so far.
Before the discussion, the teacher/students should:
During/After the discussion, the teachers/students should …
What do you think?
I’m most excited about the planning stages, where the teacher has to really explicitly decide the purpose of the discussion. This could change based on what the students do, but having a clear purpose and recognizing the nuances between generalizing, versus comparing, versus giving feedback, etc. will help me make the discussions more focused and therefore (hopefully) more accessible and engaging.