Justifying mathematical reasoning
Construct and follow multi-step mathematical arguments; identify errors in reasoning and explain why a method works or does not work
Typical age: 7–8 years
“If your child hears another child's explanation for how they solved a maths problem, can your child say whether the reasoning makes sense — and if not, point out exactly where the logic goes wrong?”
0 / 3 mastered
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Needs first
- Describing Aloud
Cross-subject: constructing and following multi-step mathematical arguments requires the ability to express thoughts and give well-structured explanations orally
- Teaching It Back
Constructing multi-step mathematical arguments and identifying errors in reasoning is the maths form of the universal self-explanation habit
- Explaining Mathematical ReasoningREQUIRED
Age 7-8 arguing/justifying builds on age 6-7
- Adding and subtracting (age 7+)
Explaining columnar methods exercises identifying and justifying steps
- Addition and subtraction strategies (age 7+)
Explaining why strategies work exercises constructing arguments