During a recent workshop, I got engaged in a very interesting conversation about increasing the perception of the classroom as a safe, mistake-resilient environment.
I think this kind of process empowers the students to control what happens in the classroom, and increases engagement in debate-based classes. The same kind of process could be applied to knowledge mastery classes, allowing for students to interrupt a lecture to ask for clarifications on new terms or concepts.
The next, less disruptive iteration of this idea would be to allow for a “parking lot” of requests for explanations. That parking lot could be physical (write your question on an index card and pass it to the TA; write the question on a blackboard) or digital (tweet your question, use the discussion board, use a collaborative Google Doc for the class, etc.). For these processes to work, it is important for the instructor to monitor and address the parking lot into the class routine, either as face-to-face or as online loops.
Anyway, just a little teaching nugget I wanted to share!