Thank you so much for the clarification, @chriscas!
I was not sure whether I simply could not find the definite solution for this issue, so I am really glad that I can get back to the staff with a clearer answer. (Although the lecturer might not be so happy with it, unfortunately.)
I've been thinking about some possible workarounds:
- Encouraging students to put profile pictures to help distinguish them from another:
- @ mentioning does not display their profile pictures, so that's a dead end. 😞
- Encouraging students to change their display names.
- Not alone this could raise privacy concerns, but also most institutions, including ours, do not allow students to change their display names.
It seems there is not much we can do at this point.
Again, thank you for your helpful response. It's much appreciated. 🙂