Attendance Management: institutional attendance without a biometric machine.

Context

Biometric attendance machines are expensive per room, queue students at the door, and stop working entirely when the power or the network does. Paper registers avoid all of that and create a different problem: nothing is aggregated and nothing is verifiable.

What kept breaking

Registers were transcribed into spreadsheets weeks later, so shortfalls surfaced long after anything could be done. Corrections were made in place with no record of who changed what. And a lecture hall with poor connectivity meant any online-only system simply could not be used.

The real requirement

Capture that never depends on the network, aggregation that is immediate once synced, and a change history that makes a disputed attendance record answerable.

Offline capture with background sync

Marking is written locally and drained by a WorkManager job when connectivity returns. The teacher never waits on a spinner and never loses a register because a lecture hall has thick walls.

Large-list performance

Institutional rosters are long. Records are paged rather than loaded wholesale, so scrolling a large cohort stays smooth on the mid-range devices staff actually carry.

Append-only audit log

Corrections are legitimate and expected; silent corrections are not. Every administrative change is appended to a log rather than overwriting history, which is what makes a contested record settleable.

Identity claiming

Students authenticate themselves and then claim their institutional student ID, so the roster imported by an administrator and the person holding the phone are linked without an administrator handing out credentials.