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 adding up to 20 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.
- 10+2=?
The answer is 12. A child who answers 8 probably took away instead of adding.
- 5+2=?
The answer is 7. A child who answers 6 probably counted one too many or too few.
- 1+5=?
The answer is 6. A child who answers 1 probably answered with one of the numbers shown.
- 7+8=?
The answer is 15. A child who answers 5 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.