Classroom timer
A free classroom timer built for the projector: press F and the ring and digits fill the board. It opens on five minutes, the most common transition length, and needs no login on a school computer. Also searched as class timer, teacher timer, timer for classroom.
Routine lengths that work
| Routine | Time | Set with |
|---|---|---|
| Transition between activities | 2 min | key 2 |
| Turn and talk | 3 min | key 3 |
| Brain break | 5 min | this page |
| Exit ticket | 5 min | key 5 |
| Station rotation | 12 min | click the digits, Repeat on |
| Independent work | 15 min | ?m=15 in the address |
| Quiz | 20 min | click the digits |
Keyboard tips for teachers
- 1 to 9 sets that many minutes while the timer is stopped. No typing, no menus.
- Space starts and pauses. Pause when a question comes up, resume when it is answered.
- R resets to the same length for the next group.
- F toggles fullscreen. Escape leaves it.
- Tick Repeat for station rotations. The alarm sounds and the same time restarts on its own.
Sound and display choices
The Bell sound carries across a room but lands softer than Beep, which keeps the class calm during tests. For silent tests, choose Silent and watch the ring turn green at zero. The moon button switches to dark mode, which glares less when the lights are off for the projector.
Settings are saved in the browser, so the school laptop remembers your sound and theme next period. Bookmark the 5 minute timer and the fullscreen timer for one-click starts. The timer for teachers guide walks through full lesson routines, and the kids timer page explains the visual ring for younger students.
Frequently asked questions
Does the classroom timer work on an interactive whiteboard?
Yes. It runs in any browser. Press F for fullscreen, then tap Start on the board or press Space on the keyboard.
Can students see the time from the back of the room?
In fullscreen the digits are about a quarter of the screen height, which is readable from the back of a normal classroom on a projector.
Will it keep counting if I switch to my slides?
Yes. The timer is tied to the clock, and the remaining time shows in the browser tab. Turn on Notify to get an alert while you are in another window.
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