How do I start the timer?

Enter the minutes for your period, then press Start. The big countdown begins and you can pause or reset it at any time.

Does it ring when time is up?

Yes. A bell sound plays in the browser when the countdown reaches zero, so the whole class can hear it.

Yes. Set minutes and optional extra seconds, so you can time quizzes, breaks or activities of any length.

A big, clear countdown for lessons, tests and activities. Set the minutes, press start — a bell rings when time runs out.

40:00

Set the time and press Start.

Minutes

Seconds

Ring bell at the end

Note: Keep the tab open so the bell can play. The first Start press unlocks the sound for the browser.

Show the timer on a projector so the whole class sees the time.
Set 2 minutes less than the real limit as a warning, then reset for the final stretch.
For exams, pause during announcements so students get the full time.
Use the 5-minute preset for quick brainstorm rounds between topics.