Classroom Timer

1. Type the minutes and seconds.
2. Press Start, or the Space bar, and put it in full screen for the board.
3. Add a minute if the class needs longer. When time's up, the screen turns red and your chosen sound plays.

• Do now and starter tasks. Put a countdown on the board as pupils come in, so they can see how long they have.
• Timed writing and exam practice. Run an exam question or a whole mock paper under timed conditions, for up to 180 minutes.
• Tidying up and moving on. A short countdown, with a sound at the end, for packing away or switching activities.
• A visual timer for the board. In full screen the time is big enough to read from the back of the room, and the screen turns red when time's up.

From 1 second up to 180 minutes, which covers a double lesson or a mock exam. Seconds over 59 carry over, so 90 seconds is 1 minute 30.

Yes. Add a minute at any point, without stopping the clock. To switch to a different time, type the new time and press Set time. It starts again from the new time, ready for you to press Start.

Gentle tone, Double chime, Triple beep, Alarm, Air horn, Siren, or Buzzer. Set the volume and press Test to hear it before the lesson, or switch sound off for a silent timer. The sound comes through the computer's speakers, so check they're on and not muted.

Space starts or pauses, R resets, M adds a minute, and F opens full screen. Esc or F leaves full screen again.

Yes. It works from the time it should end, so it stays right while you're on another tab, and the time left shows in the tab's title. The sound still plays at the end, as long as the tab stays open.