Math lesson plan · 4th grade (Year 5 in England) · 45 minutes
Multiplicative comparison (times as many)
Multiplication and division
CCSS 4.OA.A.1CCSS 4.OA.A.2England: Y4 Multiplication and division
Objective and success criteria
Students will: Multiplicative comparison (times as many).
- I can answer questions on today's skill on my own, without help.
- I can explain each step and say why it works.
- I can check my answer and spot a mistake.
Before and after
Needs first: Times tables to 12 × 12
Leads to: Scaling problems: times as many and recipes
Materials: Counters for arrays, Multiplication grid, Base-ten blocks, Mini whiteboards and pens, Printed student sheet (below).
Warm-up · 5 min
- Quick retrieval from earlier learning (Times tables to 12 × 12). Students answer on mini whiteboards.
- Show answers together and note who needs support in the main task.
- 6 × 11 = ? → 66Prompt: Is there a fact you already know that is close?
- __ × 4 = 40 → 10Prompt: Which number in the 4 times table gives 40?
- Which of these is 11 × 12? (132 / 142 / 143 / 120) → 132Prompt: Use a fact you know and adjust.
Hook · 5 min
- Show an array of chairs, eggs or windows and ask how many there are without counting one by one.
- Share the objective: Multiplicative comparison (times as many). Read the success criteria together.
I do: model it · 10 min
- Work through the example out loud, saying why you do each step, not just what you do.
- Example: Yuki has 4 badges. Arjun has 7 times as many. How many badges does Arjun have?
- Step 1: 4 × 7 = 28
- Answer: 28
- Pause after each step and ask a student to say what comes next.
We do: guided practice · 10 min
- Do these together. Students try each step on whiteboards before you reveal it.
- Use the hints as prompts rather than giving the answer.
- Kwame has 7 badges. Hana has 9 times as many. How many badges does Hana have? → 63Prompt: "9 times as many" means multiply by 9.
- A giraffe is 64 feet tall. That is 8 times as tall as a child. How tall is the child, in feet? → 8Prompt: The giraffe's height is the bigger amount.
You do: independent practice · 10 min
- Students work on the student sheet. Circulate and check the first two answers of every student early.
- Students who finish: write a question of their own for a partner, with the answer.
The 8 questions are on the student sheet below, with answers in the key.
Exit ticket · 5 min
- Two questions on their own. Sort answers into got it / nearly / not yet to plan the next lesson.
- Ines has 6 badges. Elena has 8 times as many. How many badges does Elena have? → 48Prompt: "8 times as many" means multiply by 8.
- A giraffe is 9 feet tall. That is 3 times as tall as a child. How tall is the child, in feet? → 3Prompt: The giraffe's height is the bigger amount.
Watch out for
- Thinking multiplying always makes a number bigger.
- Dropping a zero in long multiplication when moving to the tens row.
Support and stretch
Support
- Review first: Times tables to 12 × 12.
- Use concrete materials: counters for arrays.
- Give the first step of each question, or a partly worked example to finish.
- Pair with a confident partner for the guided practice.
Stretch
- Move on to: Scaling problems: times as many and recipes.
- Explain a common mistake in writing and how to fix it.
- Write a word problem that uses today's skill, then solve a partner's.
Homework and more practice
Free online practice with hints and printable worksheets for this skill: eurekami.com/math/grade-4.
Free lesson plan from eurekami.com/lesson-plan-builder