Digital Clock
A digital clock is an alternative to a traditional analogue clock. This type of clock shows numbers to display the time in a digital format, such as on a watch, phone or an alarm clock.
About
The problem it solves You can use this fantastic Digital Clock Counting Back in Time Problem Solving Worksheet to encourage children to solve problems involving times elapsed before with intervals of 15 minutes, half an hour, 45 minutes or an hour.
How it's made
Challenges we ran into When I faced a problem of getting late for going to college then i think If I had a watch then I should go to college on time.