Why school ratings disagree
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School ratings disagree because each one is a different recipe. Some are built almost entirely from test scores. Others weigh how much students improve, or mix in parent reviews and AP classes. Put the same school through different recipes and you get different grades. Before trusting any rating, find out what went into it.
What each rating is actually made of
Here are the big ones, as each describes its own method. All of this was checked in October 2026, and the sites do change their formulas. Niche added two new factors to its grade this year.
| Rating | What mostly drives it | Rates private schools? |
|---|---|---|
| GreatSchools, 1 to 10 | Test scores and student progress. High schools add college readiness. The mix shifts from school to school, and it leans toward whichever of the two the school does better on. | No |
| Niche, A+ to D- | For public high schools, academics is 60%. The rest is diversity, teachers, parent and student surveys, and smaller pieces like clubs and sports. | Yes |
| U.S. News, ranked lists | High schools: half is state test scores, 40% is AP and IB exams, and the rest is graduation rate. Elementary and middle: math and reading scores only. | No |
| SchoolDigger, ranks and 1 to 5 stars | State test scores, averaged. Nothing else. | No |
| Your state’s report card | Whatever your state chose. Usually test scores, growth and graduation, in its own proportions. | No |
Read down the middle column and the disagreements stop being mysterious. A school with average test scores and a strong AP program can rank well on U.S. News and middling on SchoolDigger. Both are reporting their numbers correctly. They just asked different questions.
The split that matters most: scores versus growth
Most of the gap between ratings comes down to one choice. Does the rating care where students end up, or how far they moved?
A test score tells you how many students cleared a bar this year. That depends a great deal on what happened before they ever reached the school. Growth tells you how much the same students improved while they were there. That is much closer to what the school itself is doing.
The research on this is unusually clear. A 2019 Stanford study of more than 11,000 school districts found that average test scores track family income closely. Growth tracks it far less. Its author, Sean Reardon, concluded that average scores on their own are likely a poor measure of school quality.
So a rating built mostly on test scores will often line up with how well-off a neighborhood is. That isn’t a flaw in the math. It’s what test scores measure. It does mean a high score can say more about local incomes than about the teaching.
Ratings that weigh growth push back against this. A school that takes students who start behind and moves them a long way can look excellent on growth and ordinary on scores. Whether that school is “good” depends on which of those you care about. Most parents care about both.
Reviews measure something real, but not the same thing
Niche is the main rating that folds in what parents and students say. Survey answers feed into almost every part of its grade, not just the one labeled for them.
That tells you something test data can’t: how the place feels to the people in it. It also comes only from the families who chose to answer, and those tend to be the most pleased or the most upset. Treat reviews as color, not as a measurement.
Your state grades schools its own way
Federal law requires every state to rate its public schools each year. It does not tell states how. Each state picks its own measures and its own scale.
Ohio gives schools one to five stars. Texas gives them a letter from A to F, where 70% of the grade is the better of two scores: achievement or progress. Other states have scales of their own. A Texas “B” and four Ohio stars are not the same thing, and nobody claims they are.
State tests differ too. “Proficient” in one state is a different bar from “proficient” in the next. That matters most if you’re moving between states and trying to compare schools in each.
Private schools mostly fall through the gaps
Of the ratings above, only Niche grades private schools. Most private schools don’t take state tests, and that removes the input most ratings depend on. If you’re weighing a private school, a rating site usually has the least to say about it.
Where ours fits
We score every public and private school from 1 to 10, using free public data. Ours leans on growth wherever a state publishes it. It adjusts for different state tests so schools can be compared across state lines. And it tells you when we know too little about a school to put a number on it.
It is still a recipe, and it has limits too. We list them on how we score schools, including where our score is weakest. You can see the scores for any area on the schools map.
How to read any school rating
- Find out what is in it. If a site won’t say, weigh it less.
- Look for growth, or “student progress,” next to the test scores. If the two disagree, that gap is the interesting part.
- Check the year. Ratings often run on data that is a year or more old.
- Compare schools within one state before comparing across states.
- Use the rating to narrow your list, not to decide. Then visit, and talk to families who are there now.
If you’d like to see how schools near you score, and why, the school layers are on the map.