Using Ratio Language

Overview

In this 30-minute lesson, Year 6 students will deepen their understanding of ratio concepts by focusing on the language used to express ratios. They will explore key terms such as part, whole, and to and practise communicating ratios both verbally and in writing. This lesson builds on prior knowledge of comparing quantities and sets a strong foundation for more complex ratio problem-solving in later lessons.

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National Curriculum Links

• Mathematics – Year 6 – Number: Ratio and Proportion
  • Use scale factors, scale diagrams and maps
  • Solve problems involving the relative sizes of two quantities where missing values can be found by using integer multiplication and division facts
  • Express ratio as a relationship between two quantities
  • Specific Objective: Translate information between different forms, such as words, diagrams and symbols

This lesson is designed to address the curriculum’s requirement for pupils to confidently use ratio language and express ratios effectively, a prerequisite skill for problem solving with ratios.

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Learning Objectives

By the end of the lesson, pupils will be able to:

1. Define and use key ratio vocabulary: part, whole, to.
2. Express ratios using appropriate verbal and written forms, e.g. “3 to 2”, “3:2”, “3 parts to 2 parts”.
3. Translate simple ratio scenarios into written expressions and verbal explanations accurately.

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Resources

• Whiteboard and markers
• Mini-whiteboards and pens (1 per pupil)
• Printed cards with ratio scenarios (e.g., 4 red marbles to 3 blue marbles)
• Ratio language word wall poster (displayed in classroom)
• Timer or stopwatch
• Optional: Visual aids like counters, coloured blocks or ratio bars

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Lesson Structure

1. Starter Activity – Ratio Vocabulary Revival (5 minutes)

• Begin by asking pupils to recall what a ratio is and discuss briefly if they encountered ratio language in the previous lesson.
• Introduce or display the key vocabulary: part, whole, to. Write these on the board.
• Show simple examples (e.g., 3 apples to 2 bananas) and ask:
  • Which is the ‘part’?
  • How do these parts make a whole?
  • How do we say this ratio aloud?

Teacher tip: Use questioning to engage learners and assess prior knowledge informally.

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2. Explanation and Modelling (7 minutes)

• Clearly explain what each term means in the context of ratios:
  • Part: one portion or section of the ratio
  • Whole: the total quantity made by combining the parts
  • To: the connective word that links two parts in a ratio
• Model how to express a ratio both verbally (“3 to 2”) and in writing (“3:2” or “3 parts to 2 parts”).
• Write more examples on the board, including those with different objects or quantities (e.g., 5 dogs to 7 cats).
• Highlight the importance of clear and consistent ratio communication.

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3. Guided Practice – Talking and Writing Ratios (10 minutes)

• Divide pupils into pairs and give each pair several printed cards showing different ratio scenarios (like pictures or numbers).
• Pupils take turns to:
  a. Describe the ratio scenario verbally using the correct language (“There are 4 parts red marbles to 3 parts blue marbles”).
  b. Write the ratio using digits and symbols (“4:3”).
• Circulate and listen, providing immediate feedback and correcting any misuse of language.
• Bring the class back together to share some examples aloud.

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4. Independent Activity – Ratio Language Mini Challenge (6 minutes)

• Pupils each use a mini-whiteboard to complete 3 quick prompts:
  1. Write the ratio for “6 green pencils to 2 yellow pencils” verbally and using symbols.
  2. Identify the parts and the whole when the ratio is 7:3.
  3. Write a sentence describing a ratio of 5:4 for quantities of dogs and cats.
• Use a timer to make it engaging and fun.
• Collect a few responses for rapid peer or teacher assessment.

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5. Plenary – Reflect and Recap (2 minutes)

• Ask pupils to explain in one or two sentences why using clear ratio language is important.
• Reinforce the connection between accurate language and problem solving.
• Display the word wall poster again and encourage pupils to use this vocabulary confidently in upcoming lessons.

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Assessment & Differentiation

• Formative assessment: Through questioning, paired discussions, and mini-whiteboard activity, assess pupils’ understanding of ratio language and their ability to communicate it.
• Support: Provide sentence starters or prompts for pupils who need scaffolding (e.g., “This ratio shows … parts to … parts”).
• Extension: Challenge more confident learners to create their own ratio scenarios and write complete ratio statements with reasoning.

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Teacher Notes

• Emphasise the importance of linking quantity to language; ratios are not just numbers but relationships.
• Encourage pupils to use ‘parts’ instead of just numbers to conceptualise ratios.
• Use real-life examples familiar to pupils (e.g., sports team players, fruit baskets) to make language meaningful.
• Maintain a brisk pace to fit the 30-minute window while allowing sufficient speaking opportunities.

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By carefully integrating key vocabulary with verbal and written practice in interactive and enjoyable ways, pupils will confidently internalise the language of ratios, fully meeting the Year 6 National Curriculum expectations.