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Student resource · SATs & 11+ · PDF

Ratio, Proportion and Scaling

A Year 5 lesson that builds from a quick review of primes and multiples into comparing and simplifying ratios, sharing amounts in a ratio, and scaling recipes using the unitary method.

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Mels

Maths · SATs & 11+

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Ratio, Proportion and Scaling
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Description

What this is

Ratio, Proportion and Scaling

Summary: A Year 5 lesson that builds from a quick review of primes and multiples into comparing and simplifying ratios, sharing amounts in a ratio, and scaling recipes using the unitary method.

Lesson breakdown:

  • Warm-up: Practise finding a lowest common multiple and identifying prime numbers.

  • Recap and goals: Review factors, multiples and primes, then introduce the lesson objectives.

  • Key vocabulary: Explore ratio, proportion, scale and quantity.

  • Simplifying ratios: Compare groups and simplify a ratio by dividing by the highest common factor.

  • Sharing in a ratio: Work out total parts, find the value of one part, then calculate each share.

  • Scaling and recipes: Use the unitary method, including a worked smoothie example and a listening challenge about scaling a scone recipe.

  • Final check: Try questions on sharing in a ratio and scaling quantities.

Note: The lesson ends with two checkpoint questions. The original plan mentioned a speed test and self-assessment against mark schemes, which aren’t currently included.

What you get

Ratio, Proportion and Scaling Summary: A Year 5 lesson that builds from a quick review of primes and multiples into comparing and simplifying ratios, sharing amounts in a ratio, and scaling recipes using the unitary method. Lesson breakdown: Warm-up: Practise finding a lowest common multiple and identifying prime numbers. Recap and goals: Review factors, multiples and primes, then introduce the lesson objectives. Key vocabulary: Explore ratio, proportion, scale and quantity. Simplifying ratios: Compare groups and simplify a ratio by dividing by the highest common factor. Sharing in a ratio: Work out total parts, find the value of one part, then calculate each share. Scaling and recipes: Use the unitary method, including a worked smoothie example and a listening challenge about scaling a scone recipe. Final check: Try questions on sharing in a ratio and scaling quantities.

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Written by Mels

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Mels

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Mels publishes resources on TutorTech. Their identity and qualifications were checked before anything they sell went on sale.

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