Lesson: Roman Numerals

Year: 3 | Subject: Mathematics | Time Allocation: 100%

Class/Set: ____________ Date/Term: ____________

LO (WALT): To read Roman numerals from I to XII and tell the time on an analogue clock.

Success Criteria (WILF):

1. I can recognise the symbols for I, V, and X.
2. I can match Roman numerals I–XII to the numbers 1–12.
3. I can read and tell the time to the nearest hour or half-hour on a clock using Roman numerals.

1. Starter (15%)

• Recall: Ask students to count from 1 to 12 as a class. Write the digits 1, 5, and 10 on the board.
• Introduce: Reveal the Roman symbols I, V, and X.
• Match: Ask students to guess which symbol belongs to which number.
• Bridge: Explain that today we are learning a secret code used by the Romans that we still see on clocks and watches today.

2. Main Activity (70%)

Teacher Input:

• Explain: Demonstrate the building blocks: I = 1, V = 5, and X = 10.
• Model: Write the numerals I to III. Explain that when we add a symbol after a larger one, we add it (VI = 6). Explain that a symbol before a larger one means we subtract (IV = 4, IX = 9).
• Demonstrate: Display a large analogue clock with digits 1–12. Next to it, draw a clock face with Roman numerals I–XII.
• Compare: Point to '4' on the digit clock and 'IV' on the Roman clock. Repeat for '9' and 'IX', as these are often the most challenging for Year 3.
• Model: Set the Roman numeral clock to 3 o'clock (III). Show students how the hour hand points to the numeral just like it does with digits.

Student Task:

• Task A (Matching): Students complete a table matching the digits 1–12 to their Roman numeral counterparts (I–XII).
• Task B (Reading): Students look at six images of analogue clocks with Roman numerals and write down the time shown (focusing on o'clock and half-past).
• Task C (Problem Solving): "The hour hand is pointing at IX and the minute hand is at XII. What time is it?" Students must draw this onto a blank clock template.
• Support: Provide a "Roman Numeral Cheat Sheet" (I, V, X) for students working towards the objective.
• Challenge: Ask "Greater Depth" students to predict what the numeral for 13 (XIII) or 20 (XX) might look like based on the patterns they have seen.

3. Plenary (15%)

• Check: Hold up a physical clock with Roman numerals set to half-past VI. Ask students to write the time in digits on their mini-whiteboards.
• Reflect: Ask: "Why is it important to know Roman numerals even if we usually use digits?" (Encourage answers about watches, old buildings, and history).

4. Resources

• Physical analogue clocks with Roman numerals.
• Mini-whiteboards and pens.
• Matching table worksheet (Digits vs. Roman Numerals).
• Clock face templates (Blank).

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⚠ TEACHER’S GUIDANCE

💡 Pedagogical Opportunity

• The 'IIII' Quirk: Many traditional British clocks use IIII instead of IV for the number 4 to create visual balance with VIII. Mention this to students as a "Detective Fact" if your classroom clocks use this format to avoid confusion.
• Modelling: For Year 3, focus heavily on the visual transition. Use a "Look, Cover, Write, Check" approach for the sequence I to XII.

🎯 Common Misconceptions

• Reversal: Students often confuse IV (4) and VI (6). Use the "V is 5, I before is 4, I after is 6" mantra.
• X as 10: Ensure students do not confuse the letter 'X' with a multiplication sign in this specific context.

✅ Answer Key & Mirror-Labeling

• Task A Answer (Matching): 1=I, 2=II, 3=III, 4=IV, 5=V, 6=VI, 7=VII, 8=VIII, 9=IX, 10=X, 11=XI, 12=XII.
• Task B Answer (Reading): 1. 1 o'clock (I), 2. Half-past 4 (IV), 3. 8 o'clock (VIII), 4. Half-past 10 (X), 5. 12 o'clock (XII), 6. Half-past 2 (II).
• Task C Answer (Problem Solving): The time is 9 o'clock. The clock should show the small hand at IX and the large hand at XII.