i'd like to use this in a classroom setting where either every participant, or the moderator/teacher can see all shared windows but decide to feature only one or two of them.

one way to do that would be the ability to minimize shared windows.

the teacher (or anyone with moderator privileges) would be allowed to minimize windows, but also have a way to look at windows while minimized (as a teacher i want to see what everyone is doing on their own windows, while at the same time get the students to focus on a particular window.)