A bar model can be used as a way of understanding speed, distance and time calculations. The total length of the bar represents both the total distance and the total time taken. The bar is divided ...

This technique for measuring distance involves some gut-level estimation, but it's pretty easy. You just have to guess—or know—the size of an object in the distance. If you find yourself ...

When displaying a journey, the vertical axis will often represent the distance from a particular place rather than the distance travelled. Such graphs are known as displacement-time graphs.