Time Lab
How long until lunch? Answered forever.
A full-screen school-day countdown with period cards, passing time, and an optional chime. Enter your bell schedule once and it stays on the device.
The problem
Twenty kids ask what time lunch is, and the clock on the wall does not know your bell schedule. Transitions run long because nobody can see how much time is left.
How Time Lab helps
Time Lab puts the current period and the minutes remaining on the big screen. Set up your periods once, pick a chime for the end-of-period warning, and go fullscreen. There is no schedule baked in — yours stays on the device.
5 things, done properly
Period cards and passing time
See the current period, what comes next, and the passing time between them.
End-of-period chime
An optional warning chime gives the class a heads-up before the transition.
Fullscreen for the board
Built to sit on the classroom display all day, readable from the back of the room.
Your bell schedule, on the device
Enter the periods once; they stay in that browser. Edit or clear them any time.
No sign-in required
Open it and go. No account, no roster, no student data.
Works on the devices your school already has
Any modern browser. Works after the first load without internet.
Privacy & data, in one table
| Where data lives | localStorage |
|---|---|
| Cloud storage | None — nothing is uploaded. |
| Service providers | Google Fonts |
| Student data leaves the device? | No student data is involved. |
| Retention | Bell times on device only. |
| Export | — |
| Deletion | Edit/clear in-app. |
Full details: Privacy Policy · Student privacy · District handout
What it costs
Included in All-Access
One subscription, every teacher tool
or $39.99/year — save 33%
- Time Lab plus every Big Brain Labs teacher tool
- 14-day free trial — no credit card required
- New tools included automatically · Cancel anytime
Questions teachers ask
Do I need an account?
No. Time Lab opens without a sign-in. It is listed with the teacher tools because it is part of the same toolkit.
Does it handle A/B days or cycles?
You enter the periods for the day you are running. Save a schedule per day type and switch between them.
Is anything stored online?
No. Your bell times stay in the browser on that device.
Pairs well with
Ready to try Time Lab?
No sign-in — it opens right in your browser.