Roman Numerals Fun

Overview

This 60-minute lesson introduces Year 4 students to reading and understanding Roman numerals, following the National Curriculum for England's mathematics subject criteria. The focus is on number representation and place value using Roman numerals, supporting pupils’ grasp of number systems beyond standard Arabic numerals.

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National Curriculum Links

• Mathematics Program of Study: Year 4 - Number - Number and Place Value
  • Recognise and use Roman numerals up to 100 (I to C), and know that over time, the numeral system changed to include zero and place value
  • Read Roman numerals and understand their symbols and values

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Learning Objectives

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

• Identify and read Roman numerals from I to C (1–100)
• Understand the basic rules of Roman numerals (addition and subtraction principles)
• Convert simple numbers between Arabic numerals and Roman numerals
• Recognise Roman numerals used in real-life contexts (clocks, dates, monuments)

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Success Criteria

I can:

• Say what numbers the symbols I, V, X, L, and C represent
• Read Roman numerals up to 100 confidently
• Explain the rules of Roman numerals (why IV is 4, VI is 6)
• Write simple Roman numerals for given numbers up to 100
• Spot Roman numerals in everyday things

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Resources

• Roman numeral charts (classroom display and individual copies)
• Whiteboards and pens for individual work
• Number cards (Arabic & Roman) for matching games
• Large clock face with Roman numerals (analogue style)
• Printed worksheets with conversion exercises and puzzles
• Interactive whiteboard or projector

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Lesson Structure

1. Engaging Introduction (10 minutes)

Hook: "Time Travel Ticket"
Tell the class: "Today, we are going back in time to Ancient Rome! Imagine you’ve landed in a Roman city, and you want to tell the locals what time it is or your age, but you don’t know their numbers. How can you figure that out?"

• Show a large Roman numeral clock face. Ask:

  • “What do you notice about the numbers?”
  • “Which ones look familiar or different to what we use today?”
  • “Why might ancient people have used these numbers?”

• Briefly introduce the symbols I, V, X, L, and C by holding up flashcards.

Questioning to drive curiosity:

• “What do you think the symbol ‘I’ represents?”
• “If ‘V’ looks like a 5, how could we make 6?”
• “What do you think happens if we put an I before a V?”

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2. Main Activity 1 – Teaching and Modelling (15 minutes)

• Explain the five key Roman numerals: I(1), V(5), X(10), L(50), C(100).
• Illustrate the basics:
  • Repetition adds (III = 3) but not more than three times
  • Placing smaller numerals before larger subtracts (IV = 4, IX = 9)
  • Placing smaller numerals after adds (VI = 6, XI = 11)
• Use visual number line or place numerals on the board, showing the addition and subtraction process of Roman numerals.

Guided Practice:

• Together, convert Arabic numbers 1-20 into Roman numerals, using whiteboards.
• Encourage pupils to ask “Why is it written like this?” and discuss the rules.

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3. Main Activity 2 – Interactive Group Work (20 minutes)

Roman Numerals Mystery Challenge:

• Split the class into 5 groups of 6 pupils.
• Each group receives a set of number cards (Arabic numbers 1-100) and Roman numeral cards.
• Challenge: Match Arabic numbers to correct Roman numerals as quickly and accurately as possible.
• Extend with tougher cards (e.g., 44 (XLIV), 90 (XC)) for advanced groups.

Additional Spin:

• Use the Roman numeral clock. Groups write down the time shown in Roman numerals and convert it back to Arabic numerals.

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4. Plenary (10 minutes)

• Invite pupils to discuss:
  • “What surprised you about Roman numerals?”
  • “How are they different from regular numbers?”
  • “Can you explain how 9 is written as IX?”

Whole class quiz:

• Rapid-fire questions using flashcards: Teacher shows a Roman numeral, pupils call out the number, or vice versa.
• Use thumbs up/thumbs down to check confidence.

Exit Ticket:

• Each pupil writes down a number in Roman numerals or converts one given Roman numeral to Arabic. Collect responses to assess understanding.

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Assessment

• Observations during group challenges and guided practice
• Responses to questioning and plenary quiz for oral formative assessment
• Exit tickets to check individual understanding and identify pupils needing support

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Differentiation

• Support: Provide Roman numeral charts with annotated rules for pupils who need it
• Challenge: Encourage more fluent pupils to write dates or numbers above 100 (e.g., 101 as CI)
• Visual support with number lines and comparisons for pupils with learning differences

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Homework Suggestion

• Find examples of Roman numerals in your home or local environment (dates on coins, clocks, books). Draw or write them down and explain what numbers they represent.

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This lesson plan combines interactive, visual, and exploratory learning strategies focused on National Curriculum requirements. It actively engages pupils with historical context and practical application, ensuring understanding and enthusiasm for the concepts of Roman numerals.