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 ten more, ten less 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 is 10 less than 86?
86The answer is 76. A child who answers 86 probably started counting from the wrong number.
What is 1 less than 72?
72The answer is 71. A child who answers 73 probably added instead of taking away.
What is 1 more than 44?
44The answer is 45. A child who answers 43 probably took away instead of adding.
What is 10 less than 34?
34The answer is 24. A child who answers 33 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.