Username that Resets on login
Context: I'm a high school math teacher and extremely new to Debian/Linux. I've got ~20 laptops that are not allowed to connect to the schools internet. To perform updates, I literally have to haul these machines home to update them.
Curious students keep messing with the display settings etc. (which I approve of) but I would like to have a 'locked' version, where students would login as something like Username: student Password: student, which would load a clean version every time.