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 rounding to any place 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.
Round to the nearest ten thousand.
927,085The answer is 930,000. A child who answers 927,000 probably rounded to the wrong place.
Round to the nearest ten thousand.
121,045The answer is 120,000. A child who answers 130,000 probably counted one group too many or too few.
Round to the nearest ten thousand.
986,482The answer is 990,000. A child who answers 980,000 probably chopped the digits instead of rounding.
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.