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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 place value to a million 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 the 4 worth in this number?
499,879The answer is 400,000. A child who answers 4,000,000 probably put the digits one place out.
What is the 4 worth in this number?
704,157The answer is 4,000. A child who answers 4 probably gave the digit instead of what it is worth.
Which number is this?
200,000+50,000+700+4=?The answer is 250,704. A child who answers 2,574 probably lost track of the ten.
What is the 7 worth in this number?
419,579The answer is 70. A child who answers 419,579 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.