You may think you're a whizz when it comes to telling the time - but what about when you're up against the clock in more ways than one?
Stop The Clock is an interactive exercise that challenges you to match the time on a digital clock with the time on a clock face.
There are five of each clock - and you need to drag the digital clock into the right place above the traditional clock.
With five-minute time being tested, this makes it a good test for kids in grades two to three - and they'll need to be quick as a timer shows how long they take to get the right answer.
The game records your fastest time, so you can test yourself to beat your own record!