So if I am understanding you correctly, if I have 2 TAs in a class and one teacher, and I only want emails to go to the teacher, I would put the 2 TA's in a group (no email group) and everyone else (teachers and students) in a different group (gets emails group). How would I indicate that I want the gets email group gets notified about assignment and quiz submissions?
I think you might be on to something here!