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.
$5 a child a month, never more than $12 for the family. The first 7 days are free and need no card.
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The mistakes behind most wrong answers
A wrong answer in counting to 100 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.
What number is missing?
899091?93The answer is 92. A child who answers 91 probably counted the last one twice.
What number is missing?
21?232425The answer is 22. A child who answers 23 probably counted one too many or too few.
What number is missing?
9596?9899The answer is 97. A child who answers 95 probably started counting from the wrong number.
What number is missing?
171819?21The answer is 20. A child who answers 10 probably lost track of the ten.
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.