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 2s. What is missing?
323436?The answer is 38. A child who answers 37 probably counted one too many or too few.
Count by 2s. What is missing?
8?1214The answer is 10. A child who answers 12 probably counted the last one twice.
Count by 2s. What is missing?
34?3840The answer is 36. A child who answers 34 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.