28 minute timer
A 28 minute countdown timer for the projector: big digits, a quiet chime, warning colours and full screen. Good for station rotations, longer writing and focus blocks.
28:00
Keys: Space start or pause · R reset · ← → 30 seconds · 1–8 the presets · M sound · F full screen
How to use it
- The timer is already set to 28 minutes. Press Start, or tap the Space bar.
- Press F to fill the screen. The buttons fade away until you move the mouse; press Esc to come back.
- Add or take off 30 seconds with the arrow keys. If you need a different length, press a preset or choose Custom.
Ideas for class
- Run a review stations activity, where each group works one set of problems and rotates.
- Run a longer writing block where students draft without stopping, then share.
- Hold a homework club or tutoring session with a visible end time.
- Give the class a silent reading period and let students record a one-line reflection after.
- Split 28 minutes into 20 to work and 8 to share: press Start, and pause at 20:00 elapsed to switch.
- The halfway mark is 14 minutes: when the digits reach it, ask students to hold up fingers for how far through the task they are.
- Divide it into 4 rotations of 7 minutes: call "switch" each time the digits show a multiple of 7.
Related
Questions
How do I keep a 28 minute timer on the screen for a whole block?
Press F to fill the screen and the controls fade away until you move the mouse. The timer keeps time by the clock, so it stays correct even if the screen dims or the tab is in the background. For a 28 minute block with stations, set it once and press R to start the next rotation from the top.
How do I change the 28 minute timer?
Press a preset button or choose Custom and type a length such as 7:30 or 90s. The page address updates to carry the new length, so you can bookmark it or share it. This page always opens at 28 minutes.
Will the 28 minute timer keep the right time if the tab is in the background?
Yes. The countdown compares the clock when you pressed Start with the clock now, so it stays right when a tab sleeps. When it reaches zero it plays a short, soft chime (press M to turn the sound off) and the page title in the tab says the time is up.
Nothing you do here is sent to us. Names, lists and settings stay in this browser. No sign-in, no ads.