Year 6: Four Operations: Lesson 13 – Primes to 100

Year 6: Four Operations: Lesson 13 – Primes to 100 Help your Year 6 pupils build a solid foundation in number theory with this curriculum-aligned lesson focused on prime numbers up to 100 . The resource includes comprehensive teacher planning , differentiated worksheets , and reasoning tasks to guide pupils from discovery of primes to confident application in problem-solving contexts. Learners will: Identify prime numbers up to 100 , distinguishing them from composite numbers. Utilise strategies such as the Sieve of Eratosthenes or factor-checking to confirm primality. Engage in reasoning activities that require explanation—e.g., “Why is 73 prime?” or “Which number is not prime and why?” Access differentiated tasks to support both foundational understanding and deeper challenge. Perfect for guided instruction, independent practice, or mastery consolidation, this lesson helps pupils sharpen their understanding of primes—an essential concept in the Year 6 maths curriculum.