Lingots for your students to do timed practice or quizzes.
I'm not sure how this will work but someone posted what do I do with my extra 1000 lingots. My suggestion was give them to an educator so they can give them to students to buy timed and or quizzes. If you would like some lingots for that purpose please reply. The transfer process is a pain as it's one lingot at a time but I think it's worth trying.