More sheets come with a subscription
The first sheet at every level is free. A subscription gives you a new sheet whenever you want one — and the part paper cannot do: five minutes of practice a day that adapts to your child, and a weekly email naming exactly what they are stuck on.
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The mistakes behind most wrong answers
A wrong answer in counting in twos, fives and tens is rarely random. These are the ones that come up most often, each on a real problem — worth knowing before you mark a sheet, because the fix for each is different.
Count by 10s. What is missing?
657585?The answer is 95. A child who answers 86 probably counted one too many or too few.
Count by 2s. What is missing?
1113?17The answer is 15. A child who answers 17 probably counted the last one twice.
Count by 10s. What is missing?
24?4454The answer is 34. A child who answers 24 probably started counting from the wrong number.
In the app, every wrong answer is matched against mistakes like these, and the weekly email tells you which one your child keeps making — in those words, not as a percentage.