How to Read Your School's Rating (and What It Misses)

A school rating — a letter grade, a star count, a number out of ten — is a useful starting point, but it's a summary, not the whole story. Read it as one data point among many. You can see an estimate for any public school with our school and district rating predictor, which uses only federal public-use education data — no student records of any kind.

What the rating mostly measures

Most published ratings lean heavily on a few measurable things. Knowing what's inside the number helps you weigh it honestly.

Test scores — how students performed on state assessments.
Growth — whether students improved year over year, not just where they landed.
Graduation and attendance — especially at the high school level.

The exact mix and labels vary by state and change over time, so always check your state's official accountability site for what a given grade actually counts.

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What a rating tends to miss

Here's where I ask families to slow down. A single number can't capture the full picture of a building full of kids and teachers.

Context like poverty and student mobility, which strongly shape test scores but say little about teaching quality.
Small-subgroup noise, where a handful of students can swing a score in a small school.
Single-year swings, which can make a steady school look like it jumped or dropped.
The things that don't get measured — a caring teacher, a great arts program, a welcoming culture.

How to use the rating well

Look at the growth component, not just raw scores — a school serving a tough catchment can be doing excellent work. Compare a few years to spot real trends, and pair the data with a visit, a conversation, and your own gut. Don't write off a school over one figure, and don't assume a high grade fits your particular child.

Dig into the details

When you're ready to go deeper, see exactly how these scores are built in how school ratings are calculated, run a school through the rating predictor, and if you work in a school, explore COSMIQ for schools. You can also chat through any of it with the free voice tutor.

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