I set up a Question Creator Role as described on managing a 2.4 site. But I can't see any way to change student's role to this new one other than go through Course Administration > Users > Enrolled Users and then click on each student one-by-one and then click on the Question Creator role.
I'd like to be able to turn this role on for a class period and then off again and have groups create questions. It is way too inefficient to double click through dozens of names, and then undo the whole thing each time. Is there a way to do this as a batch that I haven't seen? (There shoud be.)