Prime and Composite Numbers

In this lesson, learners will be able to learn the difference between prime and composite numbers; build on this knowledge to identify prime numbers in a given set of numbers; and find prime numbers from 1 to 100.

Target Age: 9-10

Lesson Overview

By the end of this unit, students will be able to:

  1. Understand the difference between prime and composite numbers.
  2. Build on this knowledge to identify prime numbers from a given set of numbers.
  3. Identify prime numbers from 1 to 100.

Curriculum Alignment: Year 5 Number – Multiplication and Division

  • Know and use the vocabulary of prime numbers, prime factors and composite (non-prime) numbers.
  • Establish whether a number up to 100 is prime and recall prime numbers up to 19
Last updated on: February 27, 2026

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