Classroom Stopwatch

About this tool

A straightforward, no-frills stopwatch built to be read from the back of a classroom — large digits, a simple start/stop/reset flow, and lap tracking for activities where you need to record multiple times in a row, like timed reading fluency checks, relay-style speaking drills, or any activity broken into repeated short bursts.

Press Space to start and stop without reaching for the mouse, and L to record a lap while it's running — handy if you're timing several students back-to-back and don't want to lose track while writing scores down. Laps stack up in a simple list so you can review them after the activity is done, without needing to write anything down mid-activity.

Works in any modern browser, needs no sign-up or download, and is safe to leave open on a classroom projector or interactive board for the whole lesson.