Open Setup to configure the timer.
Instructions
Click Edit to add instructions.
Current
—
Start
—
Finish
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0:00:00
time remaining
Open Setup to configure the timer.
Only matters for the period that splits around lunch — one wave has class before lunch, the other after.
Buffer inside the period (optional)Counted down first, before the writing time starts.
Opens the timer with everything below already filled in — hand it to a sub, or bookmark it for the day.
A timer for exams and in-class tests, in the style of the SLUH schedule tools.
Fixed length counts down a set number of hours and minutes, with optional reading time added on the front.
Until end of period counts down to the moment a class period ends, using the SLUH bell schedule for the chosen date. Pick the current period, the next one, or any period that day. The Jr/Sr / Fr/So toggle changes the end time only for the period that splits around lunch. Here the middle button is Hide (blank the countdown so students stop watching it) rather than Pause — the period ends when it ends.
The buffer fields carve an exam window out of the period: "N min after it starts" delays the start (the timer waits and auto-starts then), and "N min before it ends" stops the exam early so there's time left for something else. Leave both at 0 to run the whole period. (Reading time works the same way and lives in fixed-length mode.)
In period mode the progress bar is the whole class period: a striped segment for the buffer time, the exam window as a solid band that fills as it runs, and a line for "now" — so you can see the test's place in the period and the buffer keeps ticking after the exam ends.
Once running, +5 min / +10 min push the finish time later.
Shareable links. The link at the bottom of Setup opens the timer with that exact configuration already loaded — a sub just has to press Start. It's an ordinary URL, so you can email it, bookmark it, or put it in the sub plans. A link always overrides whatever this browser used last, and never changes your own saved setup.
Add #debug to the URL to reveal a time override for
testing.
The schedule runs to the end of the 2026–27 school year. Refresh it with
build-data.py when SLUH publishes the next year's calendar.