TurtleDock
SchoolDeck · Feature

Attendance marked in the ninety seconds before a bell

SchoolDeck records attendance per period rather than per day, from a teacher’s phone, a biometric device or a card reader. The teacher app holds the register locally and syncs when signal returns, so marks taken in a basement laboratory appear timestamped when they were taken, not when the phone reconnected.

Biometric capture needs compatible hardware, which is bought separately and is not included in the per-student price.

A class teacher has about ninety seconds between arriving and the bell. Anything that takes longer than that gets done on paper and typed in later — which means the system is wrong all morning, and the person typing it in is doing the work twice.

Granularity
Per period, not per day
Capture
App, biometric device or card
Offline
Marks stored locally, synced on reconnect
Alerts
Shortfall flags by student, section or threshold
01

Why period-wise matters

A student present at assembly and absent by the fourth period is a different problem from one who never arrived, and only period-wise capture tells them apart. It is also what makes the attendance figure defensible when a shortfall decides eligibility for an examination.

The cost is more marking events, which is exactly why the marking flow has to be fast. Section-wide defaults with exceptions marked, rather than every student tapped individually, is what keeps it inside the ninety seconds.

02

The conventions that change the answer

Attendance percentage is not one calculation, and boards differ. These are set during implementation and then applied consistently, which matters more than which convention you choose.

DecisionOptionsWhere it bites
DenominatorWorking days, or days enrolledMid-year admissions look far worse on the first
Authorised absenceCounted absent, or excludedMedical leave decides examination eligibility
Half daysHalf a mark, or a full absenceChanges borderline cases at term end
Period vs dayAny period absent, or majority absentDetermines who appears on the shortfall list
FAQ

Questions people ask

Phrased the way they arrive, answered so each one stands on its own.

Does attendance work without internet?

Yes. The teacher app holds the register locally and syncs when signal returns. Marks are timestamped when they were taken rather than when they synced, so a laboratory period in a basement records correctly.

Can we use biometric devices?

Yes, alongside or instead of app marking. Devices are bought separately and are not included in the per-student price. Most schools use biometrics at the gate and the app in class, because a device per classroom is rarely worth the cost.

How are shortfall alerts triggered?

By threshold, per student and per section, using the convention configured for your board. Alerts fire on a trend rather than a single day, so a student below the requirement for three consecutive days is flagged before the term-end calculation makes it irreversible.

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Provenance

Who checked this, and against what

Accountability

Checked by the Implementations desk on 1 September 2026. Corrections go in the page, dated, rather than quietly.

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