Using ratio notation students learn how to calculate the speed when given distance and time. As learning progresses equivalent ratios are use to calculate time and distance when speed is given.

The start of the lesson recaps writing ratios in the form 1 : n by matching equivalent ratios together. The plenary challenges students to find the average speed of a journey with multiple stages.

**Differentiated Learning Objectives**

- All students should be able to use ratio notation to calculate an average speed.
- Most students should be able to use ratio notation to calculate speed, distance and time.
- Some students should be able to solve complex problems involving speed, distance and time.