This was for a school, and they needed a better way to manage the students' attendance.
- each student gets a QR code
- they check in to class via the teachers phone (like how you scan a boarding pass at an airport)
- a google sheet immediately marks the student present
(they used to pass a sheet of paper around the class, have the student write down their name, and have another employee type out the names from the paper to a database.)
The creation of the QR codes was automated by a script linking a google sheet to a google doc.
Here’s a demo: