Efficient Mental Calculation Strategies
Two different-looking calculations, 299 + 458 and 300 + 458 − 1, both equal 757. Open Full Article...
Number and Arithmetic
Prime Factors, Multiples and Divisibility (Parent Q&A)
This guide explains the lesson’s key ideas and the connections between them. Open Full Article...
Prime Factors, Multiples and Divisibility (Teach This Topic)
This guide supports a home-educated learner aged 11 to 16 with the lesson on factors, multiples, primes, divisibility, prime factorisation, HCF and LCM. Open Full Article...
Prime Factors, Multiples and Divisibility
What makes 24 a factor of some numbers but a multiple of others? Open Full Article...
Place Value in Very Large and Very Small Numbers (Parent Q&A)
This guide explains how place value gives meaning to digits in whole numbers and decimals, including numbers that are extremely large or very small. Open Full Article...
Place Value in Very Large and Very Small Numbers (Teach This Topic)
This guide supports home teaching about place value, powers of ten and standard form for learners aged 11 to 16. Open Full Article...
Place Value in Very Large and Very Small Numbers
Place value explains how a digit gains meaning from its position in a number. The same digit can represent a very large amount or a tiny fraction of one. Open Full Article...
Negative Numbers in Real-Life Contexts (Parent Q&A)
This guide explains how the lesson uses negative numbers to represent values, positions and changes in relation to a chosen zero point. Open Full Article...
Negative Numbers in Real-Life Contexts (Teach This Topic)
This guide helps you introduce negative numbers through temperatures, money, levels and elevation before connecting these ideas to formal arithmetic. Open Full Article...
Negative Numbers in Real-Life Contexts
A temperature of -3°C is warmer than -8°C because -3 is higher on the number line. Open Full Article...