# Proportion and ratio articles

What is scale factor?
Children learn about scale factor in Year 6 maths. Find out how to reinforce their understanding at home with our parents' guide to scale factor.
Best maths story books for children
Introduce ratio, pie charts, probability and even simplifying fractions to children with these brilliant maths story books, picture-book presentations of mathematical concepts that primary-school children will love.
Primary numeracy glossary for parents
From area to word problems, TheSchoolRun's primary-school numeracy glossary offers a complete guide to all the maths concepts children are taught in EYFS, KS1 and KS2. Brush up on your own mathematical skills, clear up homework confusion and understand exactly what your child is learning at school by reading our basic definitions (with links to more detailed explanations, teachers' tips and examples).
What is proportion?
We explain what proportion is and how children are taught about proportion from Year 4, giving examples of the kinds of problems involving proportion they might be asked to solve.
What is ratio?
We explain what ratio is and how children in KS2 are taught to solve problems involving ratio.
What are two-step and multi-step problems?
We explain what two-step and multi-step problems are and give examples of typical problems a child might be asked to solve in primary school (and how the answer can be worked out!).