What Is a Stanine?
"Stanine" is short for standard nine — a scoring scale that divides test results into nine groups. It's the primary score that private schools look at when evaluating ISEE results.
Each stanine corresponds to a specific percentile range:
| Stanine | Percentile | What It Means |
|---|---|---|
| 9 | 96–99 | Top 4% of test takers |
| 8 | 89–95 | Top 11% |
| 7 | 77–88 | Above average |
| 6 | 60–76 | Slightly above average |
| 5 | 40–59 | Average |
| 4 | 23–39 | Slightly below average |
| 3 | 11–22 | Below average |
| 2 | 4–10 | Well below average |
| 1 | 1–3 | Bottom 3% |
How Stanines Are Calculated
The ISEE first produces a scaled score (760–940) for each section. That scaled score is then compared to a norm group — other students in the same grade who took the ISEE over a rolling three-year period.
Your child's position within that norm group determines the percentile rank, and the percentile rank maps directly to a stanine.
This means stanines are relative, not absolute. They reflect how your child performed compared to a large pool of recent test takers at the same grade level.
The Four Scored Sections
The ISEE reports a stanine for each of four sections:
- Verbal Reasoning — synonyms and sentence completions
- Quantitative Reasoning — math problem-solving and comparisons
- Reading Comprehension — passage-based questions
- Mathematics Achievement — computation and applied math
The essay is not scored numerically — it's sent directly to schools as a writing sample.
What Schools Actually Look At
Different schools weight ISEE scores differently, but here's what most admissions offices consider:
- Individual section stanines — some schools care more about specific sections (e.g., a STEM-focused school may prioritize math)
- Consistency across sections — similar stanines across all four sections suggests overall readiness
- Comparison to the school's applicant pool — your child is being compared to other applicants to that specific school, not all ISEE takers
Schools rarely share their "minimum" stanine requirements. Instead, they evaluate the full application: grades, recommendations, interview, essay, and test scores together.
Common Misconceptions
"My child got an 8 — is that a B?" No. Stanines are not letter grades. A stanine of 8 means your child scored in the 89th–95th percentile — in the top 11% of test takers.
"A 5 is failing." A stanine of 5 is exactly average — your child performed as well as or better than 40–59% of students in the norm group. It's not a failing score.
"The stanine is based on all students nationwide." Not exactly. The norm group is students in the same grade applying to the same level of school entry. A 9th-grade applicant is compared to other 9th-grade applicants, not 7th graders.
How to Improve Stanines
Since stanines reflect relative performance, improvement means outperforming more of the comparison group. Focus on:
- Weak sections first — a diagnostic test reveals which sections have the most room for growth
- Vocabulary depth — the Verbal Reasoning section rewards broad, deep vocabulary built over weeks
- Math fundamentals — review the complete list of math topics tested and practice systematically
- Reading speed and accuracy — practice active reading with passages slightly above grade level
- Test-taking strategy — learn when to guess, when to skip, and how to pace each section
Use the score calculator to understand how raw scores translate to stanines and plan your preparation accordingly.