How to help children explain their thinking in math
Why teachers ask children to explain math answers, and simple prompts parents can use to build this skill at home.
Many worksheets now ask children to "explain how you know". This can frustrate children who just know the answer. But explaining is a skill worth building, because it shows whether a child understands or has just remembered.
Why it matters
- It shows mistakes in thinking, not just in answers.
- It helps children remember methods they can use again.
- It builds the language they will need for harder maths later.
Useful prompts
- "How did you work that out?"
- "Can you show me with a drawing?"
- "How could you check your answer?"
- "Is there another way to do it?"
- "What would change if the number was bigger?"
Accept simple explanations
For a Grade 2 or 3 child, "I counted on from 28" or "I drew 4 groups of 3" is a good explanation. They do not need long sentences. A labelled picture counts too.
Model it yourself
Talk through your own thinking when you do everyday maths: "We need 3 packs of 6 rolls. That is 18, because 3 sixes are 18." Children copy what they hear.