- To perform (mental) calculations.
- To recognise prime numbers
To know and use the vocabulary of prime numbers, prime factors and composite (non-prime) numbers (Year 5)
To identify prime numbers and (prime) factors (Year 6)
To use the concepts and vocabulary of factors, prime numbers and prime factorisation (KS3)
This lesson consists of:
A Starter consisting of a series of progressively harder addition, subtraction, multiplication and division calculations and revision of highest common factors. A connect activity getting children to identify the correct and incorrect definitions of prime numbers and a second Connect to get children explain why a specific number is prime or not. .
An Interactive Whiteboard teaching introduction for both Notebook and ActivInspire, to teach how to recognise prime numbers, composite numbers and prime factors and how to use factor trees to identify the latter..
A 4-way differentiated series of tasks requiring children to identify prime numbers, composite numbers and prime factors. Answer sheet provided to support marking.
Two AFL / Next Steps tasks, introducing multistep calculations based around prime numbers and a second revising the definitions from start of lesson.