This lesson works through ratio notation, simplifying, sharing in a given ratio, the unitary method, direct proportion and best value. It tackles the most common confusion in the topic head-on - that a ratio of 3:2 does not mean three out of two - and includes fully worked examples for sharing an amount, solving a problem where only the difference between shares is given, and comparing unit prices two different ways. British currency and units are used throughout. It is a ready-to-teach PowerPoint scaffold for an hour-long lesson on ratio and proportion.