81 of every 100
children we assess are at least one full grade behind in at least one area of math.
An area is one part of math, such as fractions, geometry or measurement. Example: a 5th grader whose fractions are at a 4th grade level counts here, even if everything else is at grade level. If your child is behind somewhere, so are most of the children we assess.
For these children, the report estimates how long it takes to close the gaps from earlier grades. For most, it is a few months.
3 months or less42 in 100 6 months to a year12 in 100 42 + 42 = 84 in 100 within 6 months · 96 in 100 within a yearThe child in the middle: about 3½ months
A gap is a skill from an earlier grade that your child cannot do yet. Closing the gaps means your child can do every skill from earlier grades, so this year’s math builds on skills your child already has.
One area of math that is a grade behind takes about 3 weeks to close.
Ratios and ratesabout 1½ weeks Operations and early algebraabout 2½ weeks Place value and multi-digit mathabout 3 weeks Statistics and probabilityabout 3 weeks Measurement and dataabout 4½ weeks Expressions and equationsabout 5 weeks Negative numbers and the number systemabout 5 weeks the child in the middle, per area2 in 3 areas take 4 weeks or less
A child behind in two areas needs about the two times added together.
What it looks like in real practice
10 daysNine 4th grade fraction skills in 10 days. Then four 5th grade fraction skills in the next 4 days. Read the story 2 monthsMore than 170 skills in about two months. About 17 hours of practice in all, spread over roughly two months. Read the story How we countedFrom the latest report of every child assessed by a family who found us on their own, read on November 2, 2026. The times are the report’s estimates at 30 minutes a day, 5 days a week. The two stories are real children, from our blog.