Tap a clock to pass the turn
Chess Timer
A full chess clock with increment, plus optional move recording. Put it on a tablet or laptop between two players and it works exactly like a real tournament clock. Black's side is upside down so it reads correctly from across the board.
Choose a time control
Or set your own
The curriculum's tournament baseline is 15 minutes plus 10 seconds per move, which is the default above. See How to Teach for which control fits your session length.