Next we introduced children to the One Metre Challenge. The challenge is that children have to create a 1metre continuous line on a piece of A4 paper. They need to measure as they go and add up as they go – it is really quite tricky, especially if you set them the challenge of only being able to use a length once or they cannot use whole numbers! This task can be as easy or as tricky as you want to make it! Here are some great examples. Some children may measure in cm and some in mm for an extra challenge.