For a teacher. A person who works on a tablet during the day gets a sixteen-character code on their Where I am page and writes it on a slip; the level check gives a start code the same way. Type the code here and the day comes back: minutes with a hand on it, what was answered in each subject and how it went, the stage they are on, and anything they flagged for help. The code carries no name and no number; the slip is theirs to hand over.
Nothing on this page leaves this device. No account, no name, nothing sent anywhere. Clearing the browser clears it.