What a stanine score means on your child's homeschool test

The report from your homeschooler's achievement test finally arrives, and somewhere in the grid of numbers there is a column labeled stanine, holding a single digit for each subject. No percentage, no raw score you can picture, just a 4 or a 6 or an 8. You want to know, plainly, whether that number is good news.

Here is the short answer first. A stanine is a score from 1 to 9 that places your child against a national sample of students in the same grade. The middle three, 4 through 6, are the average range, with 5 sitting dead center. A 7, 8, or 9 is above average, and a 1, 2, or 3 is below. So a stanine of 5 is squarely typical, a 6 is the upper edge of average, and most children land somewhere in that middle band by design. The rest of this page is where the number comes from, which tests report it, and how much weight one of them can actually carry.

What a stanine score actually tells you

The word is short for standard nine. The test takes the whole spread of scores, from the lowest to the highest in that national sample, and divides it into nine slices. Your child's slice is the stanine. Because it collapses a long ladder of raw scores into one digit, it is easy to read at a glance, which is exactly why reports lead with it. It is the same idea as a national percentile rank, just rounded hard: the percentile is a number from 1 to 99, and the stanine is which of nine bands that percentile falls into.

Notice how uneven the bands are. Stanine 5 covers a full fifth of all children, from the 41st to the 59th percentile, while stanine 9 covers only the top sliver. That is on purpose: most results cluster in the middle, so the middle stanines are wide. It also means the stanine and the percentile are two views of one result, and if you have ever read a school score report, the walk-through of what a percentile actually means on a score report reads across to an at-home achievement test cleanly.

Which homeschool tests report a stanine

Stanines are standard on the nationally normed achievement tests homeschool families order through a reseller and give at home. You will see one on the Iowa Assessments, the Stanford Achievement Test (the one often called the SAT10), the California Achievement Test, and TerraNova. On every one of them the stanine sits beside a national percentile rank and a grade equivalent, three numbers that describe the same answer three different ways. If the Iowa is the test you are weighing, the full picture of what it measures and who may give it is in our guide to the Iowa Assessments for homeschool families.

The grade equivalent is the number parents misread most, and it is worth a warning here because it often sits right next to the stanine. A grade equivalent of 5.2 does not mean your third grader is ready for fifth-grade work. It means your child scored about what a typical student early in fifth grade would have scored on this same grade-level test. It is a comparison, not a placement, and we take that trap apart in how to read a grade equivalent without over-reading it. Let the stanine and the percentile be the numbers you trust, and treat the grade equivalent as loose context.

How to read one stanine without over-reading it

The stanine's strength, that it rounds everything into one easy digit, is also its limit. Because each band is wide, two children with real differences in skill can share a stanine, and a child sitting near a boundary can slide from a 5 to a 6, or a 6 back to a 5, on very little. A single stanine is one dot on one day, usually from a test your child takes once a year. A number that holds or climbs across two or three years tells you far more than any single score. A one-year dip on a test your child took tired or rushed is not a verdict on anything.

It also helps to drop the idea of a passing stanine. There is no universal one. A few states that require homeschool testing set a floor, a 4th-stanine-or-above rule is a common shape, but that is a rule your state wrote, not a line the test draws. Which stanine counts, if any, and in which grades, comes from your state's own homeschool rules, so read those rather than reading a verdict into the number itself. And whatever the report says, it is a snapshot of how your child did against a national group on one morning, not a label for who your child is.

What Test My Kid reports instead of a stanine score

A once-a-year achievement test is the right tool for the formal, nationally normed number your state may ask for. But it leaves the other eleven months, where you are teaching every subject yourself with no outside read on whether it is landing. That gap is the one Test My Kid is built for, and it is worth being precise about what it is and is not.

Test My Kid is not a nationally normed test, and it reports no stanine, no percentile, and no grade equivalent, so it does not satisfy any state's homeschool testing requirement. What it reports is simpler and different: whether your child is approaching, meeting, or exceeding the standards for their named grade, and which topic to work on next. Each check, math or reading, takes about eight minutes on a screen, and then the practice moves to paper: with an account, the result becomes a printable worksheet for the skill that came up short. The first assessment is free, it covers grades 1 to 8, and it is calibrated to the NWEA MAP and iReady benchmarks schools use. Our page for homeschool families lays out how a placement test, a once-a-year achievement test, and a short repeatable check each do a different job across a homeschool year.

Used together they cover each other's blind spots. The annual test gives you the formal stanine and percentile your state may want on file. A short check in between tells you where your child stands against the grade month to month, so a soft spot the annual test would not reveal until next spring shows up while there is still time to work on it. The stanine answers one question well, once a year. Knowing where your child stands the rest of the year is a different job, and both are worth doing.

Last reviewed: October 31, 2026.