Your classes
One code per class, written on the board. Pupils type their name and start — there is nothing to sign up for, nothing to reset, and nothing about them stored beyond the name they typed and the lessons they finished.
Classes need a teacher account — it is where the class codes and the reports live. Pupils need nothing at all.
Accounts are not switched on here yet
Everything else works exactly as it should — your progress, your streak and your review schedule are saved on this device and will stay there. Come back for an account another time.
Carry on learning