L3 Divide by 1

This comprehensive Year 4 Maths lesson focuses on helping children understand the concepts of dividing by 1 and reinforcing prior learning in multiplication, division, addition, and subtraction. Starting with a recap of Year 4 and Year 3 summer term concepts, the lesson begins by exploring what happens when any number is multiplied by 1. Children are encouraged to write five example calculations on their boards and discuss the outcomes, establishing that the product remains the same as the number being multiplied. The lesson then transitions to division, introducing the concept of dividing any number by 1. Using a function machine model, base ten visual aids, real-life sharing examples, and part-whole diagrams, students see that the quotient always equals the original number. A hands-on activity follows, with sticky labels containing reasoning questions, encouraging children to explain their understanding rather than just perform calculations. At least four questions are completed per student to reinforce learning. The plenary is an interactive classroom game where students categorize calculations under “the number stays the same” or “the number changes,” providing immediate self-assessment. Key questions throughout the lesson encourage critical thinking, including comparisons between multiplying and dividing by 1, the consistency of the rule across all numbers, and mental strategies to solve these calculations efficiently. This lesson is ideal for primary educators seeking a structured, engaging, and interactive approach to teaching division by 1, while consolidating essential arithmetic skills and boosting students’ confidence in mental maths.