On-screen timers for classroom use

Teachers often give their students classroom tasks, quizzes or tests with a time limit and in such cases online timers or stopwatches which you can display on the screen are indispensable. Here are some of them out of the surplus of available online countdown timers.


One of my favourite timers is a countdown timer here. You can show it full-screen, set any time you need and use Pause if you