Greenbriar East Elementary vs Rocky Run Middle
A head-to-head comparison of two schools in Virginia, United States, 1.4 km apart, using official American 2025 data. The better value in each row is highlighted.
Greenbriar East Elementary
Fairfax · Public elementary · Grades PK–6
922 students
Rocky Run Middle
Chantilly · Public middle · Grades 7–8
882 students
| Measure | Greenbriar East Elementary Fairfax, Virginia | Rocky Run Middle Chantilly, Virginia |
|---|---|---|
| Success Index (US) | 80 Top 25% | 90 Top 5% |
| State rank | #346 of 1,142 | #41 of 340 |
| National rank | #5178 of 50,301 | #322 of 15,369 |
| Sector | Public | Public |
| Type | Elementary | Middle |
| Year range | Grades PK–6 | Grades 7–8 |
| Students | 922 | 882 |
| Enrollment | 922 | 882 |
| Free/reduced-price lunch | 39.3% | 19.6% |
| Students per teacher | 15.1 | 15.2 |
| Reading proficiency | 74% | 93% |
| Math proficiency | 81% | 93% |
| city | Fairfax | Chantilly |
| state | Virginia | Virginia |
| Website | – | – |
The verdict
- •Rocky Run Middle scores higher on the Success Index (US) (89.5 vs 79.6).
- •Rocky Run Middle does better on math proficiency (93% vs 81%).
- •Rocky Run Middle does better on reading proficiency (93% vs 74%).
- •Rocky Run Middle does better on community advantage (fewer free/reduced-price lunch) (19.6% vs 39.3%).
- •Greenbriar East Elementary does better on students per teacher (15.1 vs 15.2).
- •Greenbriar East Elementary is the larger school with 922 students compared with 882.
The Success Index (US) summarises published results and context from official data. It does not measure teaching quality or fit. Methodology.
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Frequently asked questions
Is Greenbriar East Elementary better than Rocky Run Middle?
On the Success Index (US), Rocky Run Middle ranks higher (89.5 vs 79.6 out of 100). The index is built from published results and context data, not from teaching quality or fit, so visit both schools before deciding.
How far apart are Greenbriar East Elementary and Rocky Run Middle?
About 1.4 km in a straight line, between Fairfax and Chantilly in Virginia.
Which has the better Enrollment?
Greenbriar East Elementary: 922. Rocky Run Middle: 882. Students enrolled in the latest NCES directory year.
How do Greenbriar East Elementary and Rocky Run Middle rank in Virginia?
Greenbriar East Elementary is 346th of 1,142 and Rocky Run Middle is 41st of 340 among elementary schools in Virginia on the 2025 Success Index (US).