This is a whole lesson on ratio that I have been observed twice at over the years at either good or outstanding. There is second lesson on ratio and lessons on proportion, which also comes as a bundle at a discount.
The starter is on equivalent ratio
Lesson Objectives + keywords
2 clear examples of sharing a quantity by a given ratio, with links to an equivalent ratio
Differentiated questions + answers
Plenary - linking the examples to equivalent ratios (real emphasis on understanding this concept)
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