Multiplication Mastery

Lesson Overview

Subject: Mathematics
Year Group: Year 4
Topic: 3-Digit by 1-Digit Multiplication – Grid Method
Duration: 40 minutes
Class Size: 25 students
UK National Curriculum Link:

• Mathematics – Number – Multiplication and Division (Year 4)
• "Pupils should be taught to multiply two-digit and three-digit numbers by a one-digit number using formal written layout"

---

Learning Objectives

By the end of the lesson, students will:
✅ Understand how to use the grid method to multiply a 3-digit number by a 1-digit number.
✅ Apply place value knowledge to break numbers into hundreds, tens, and units.
✅ Accurately solve multiplication problems using the grid method.
✅ Develop confidence in applying multiplication to real-world contexts.

---

Resources Needed

📝 Whiteboard & markers
📊 Multiplication grid method worksheet (differentiated)
🎲 Digit cards (0-9)
🧱 Lego/toy bricks (for a hands-on multiplication starter)
📸 Visual grid method poster

---

Lesson Breakdown

1. Starter Activity – Multiplication Warm-Up (8 minutes)

⏳ Activity: "Lego Arrays"

• Place a selection of Lego bricks of different sizes on each table.
• Ask pairs to count the studs and create multiplication sentences (e.g. a brick with 3 rows of 4 studs = 3 × 4 = 12).
• Class discussion on how breaking down numbers helps multiplication.

💡 Challenge Question: Ask students, If we had a brick with 123 studs and we made 4 copies, how could we work this out?

👉 Why this works: Engaging hands-on learning helps solidify multiplication concepts before formal written methods.

---

2. Introduction to the Grid Method (10 minutes)

📢 Teacher Explanation:

1. Write 146 × 3 on the board.
2. Break it into 100 + 40 + 6 using place value.
3. Draw a simple grid:

	100	40	6
×3	300	120	18

4. Add the values: 300 + 120 + 18 = 438
5. Reinforce how breaking numbers into place value makes multiplication simpler and more manageable.

🖐 Interactive Moment: Ask students to create a similar grid for 235 × 2, guiding them through the process.

---

3. Guided Practice (10 minutes)

🤝 Paired Activity: Solve Together

• Hand out differentiated practice worksheets. Each pair solves 2 grid multiplication problems by discussing and working together.
• Encourage them to verbalise their thought process ("First, we break 256 into 200, 50, and 6...").
• Walk around to offer support and challenge higher-ability learners by increasing digits (e.g., 4-digit numbers).

💭 Question to Ask: Why does breaking numbers help when multiplying large numbers?

---

4. Independent Practice – Challenge Time! (8 minutes)

✏ Task: "Mystery Numbers"

• Students choose a digit card (1-9) and create their own 3-digit × 1-digit grid multiplication problem.
• Solve it independently, then swap with a partner to check each other’s answers.
• Extension: Real-World Word Problems – Challenge students to apply their multiplication skills to money or measurement scenarios (e.g. "A school orders 124 pencils for each of 3 classes. How many pencils in total?").

📊 Differentiation:

• Support: Use number lines and pre-made grids.
• Challenge: Introduce a missing number problem (e.g. "What number must be in the box to make this true? 2__6 × 4 = 1000+").

---

5. Plenary – Quickfire Quiz & Reflection (4 minutes)

🎤 Game: "Multiplication Showdown"

• Stand up if… Teacher calls out multiplication facts (e.g., "Stand up if you solved a question where the total was over 500!").
• Discuss strategies: What helped you the most? What was tricky?
• End with a growth mindset reminder: "Every mistake helps your brain grow!"

---

Assessment

📌 Formative Assessment During Lesson:

• Listen to student discussions during partner work to assess understanding.
• Give verbal feedback while circulating during guided and independent practice.

📌 Formal Checking:

• Mark one question from each student's independent task (self-check or peer-check).
• Use a quick exit ticket: "Write one thing you learned about the grid method today!"

---

Homework/Extension Activity

📖 Real-World Challenge:

• Ask students to find a real-life example of multiplication (e.g., packs of sweets, total price of multiple items in a shop).
• Have them solve it using the grid method and bring their example to share in the next lesson.

---

Teacher Reflection Questions

🔎 Were students engaged in hands-on multiplication practice?
🧐 Did all students grasp breaking numbers into hundreds, tens, and units?
🎯 What misconceptions arose, and how were they addressed?
👩‍🏫 What strategies worked well, and what might be modified next time?

---

💡 WOW Factor Ideas

• Use mini whiteboards for an "interactive race" where students solve quick-fire grid method problems in teams.
• Have students act as teachers and explain the method to someone at home (parent/sibling).
• Create a problem-solving challenge where students "check" a mistake in a pre-worked incorrect question.

---

Summary

This dynamic, hands-on lesson gives Year 4 students the skills they need to multiply efficiently using the grid method. By balancing engagement, discussion, and independent practice, students build confidence in multiplication and real-world problem-solving.

📢 Final Thought: Maths isn't just numbers on paper—it's about understanding patterns, breaking problems into steps, and becoming confident problem-solvers!