Choose Fix Mistakes when your child needs to understand a particular wrong answer. Choose Weak Areas when repeated attempts suggest a topic needs focused practice. One error is an event; a weak-area signal needs a pattern, so do not treat the two modes as interchangeable.
A child misses a question, and the parent sees two possible responses: review that answer or practise the wider topic. Which one should come first?
The useful choice depends on the evidence you have. One wrong answer and a repeated pattern are not the same thing.
Start with the specific mistake
Ask your child to explain their first step. Did they misread the question, use an unsuitable method or make a small calculation slip? Review the first point that changed direction rather than simply comparing the final answer with a solution.
One similar retry can show whether that correction helped. A child who gets the next question right and can explain why may not need a full topic session tonight.
Look for a pattern before naming a weak area
If the same difficulty returns across several comparable questions, the issue may be broader. Then a short focused practice block can be more useful than repeatedly reopening individual errors.
In Zairoo, Fix Mistakes is for reviewing a particular missed question, while Weak Areas uses a topic signal after enough attempts. For parents, the useful distinction is one missed question versus a repeated pattern.
Keep the next task small
Choose one action: explain a missed step, or practise one topic. Do not use a weak-area label as a judgement about the child. It is a working hypothesis that should change as the child learns.
A helpful question to end with is, 'What would you try first next time?' Explore a focused next step with Zairoo when your child needs a clearer path from a mistake to another attempt.
A worked example to try together
A child writes 42 - 17 = 35 by treating the ones as 7 - 2. For this mistake, regroup 42 as 30 + 12. Then 12 - 7 = 5 and 30 - 10 = 20, so the answer is 25. Fix this particular line first. If the same regrouping error appears across several comparable subtraction attempts, a focused weak-area practice session is more useful than reopening each answer separately.
Exact questions parents can ask
"Where did your subtraction change direction?"
"Can we rename 42 so the ones are easier to subtract?"
"Does 35 make sense when we have taken away 17 from 42?"
References and further reading
How Zairoo primary maths practice works
Explore the parent practice routine, topic selection and progress information.