Stopwatch & Alarms
Classroom Stopwatch
A stopwatch for timed drills, races and presentations.
How to use the classroom stopwatch
- Press Start or the Space key.
- Press Lap (L) to record split times.
- Press Reset (R) to clear, or copy laps as CSV.
Time reading fluency, relay games or student talks, and record laps per student.
Tips
Use laps to compare repeated efforts, such as practice runs or student presentations, without stopping the clock. Copy the laps as CSV to paste them into a spreadsheet.
Frequently asked questions
How precise is the stopwatch?
It shows milliseconds and is computed from timestamps, so display delays do not cause drift.