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What's something ROCKY RUN MIDDLE does better than most schools?
Community prompt from u/allk12. Replies below.
Enrollment
882
Middle
DISTRICT 1,029 · STATE 750
SCHOOL COMMUNITY·FAIRFAX COUNTY PUBLIC SCHOOLS·NCES 510126001841
Rocky Run Middle
4400 Stringfellow Rd, Chantilly, VA 20151 · (703) 802-7700 · Fairfax County
GRADES 07–08MIDDLE21-SUBURBREGULAR SCHOOL882 STUDENTS
Student : Teacher
15.2:1
58 FTE teachers
DISTRICT 12.6:1 · STATE 13.1:1
Free / Reduced Lunch
20%
173 students
DISTRICT 39% · STATE 66%
Community
1
0 members
Enrollment and student:teacher ratio compared against other middle schools. Free/Reduced Lunch and demographics compared against all schools.
Enrollment by grade, 2024-25
| Grade | Students | Share |
|---|---|---|
| Grade 7 | 424 | 48% |
| Grade 8 | 458 | 52% |
Student demographics
70%Diversity index
The chance that two students picked at random belong to different racial or ethnic groups.
DISTRICT 74% · STATE 71% · US 70%
Student head counts by race/ethnicity from federal NCES enrollment data. District, state, and US figures are each group's share of all public school students in that area (US excludes territories). Very small groups may be suppressed in the source, so categories do not always sum exactly to total enrollment.
Gender split
Test scores
SOL 2024-25 . % PassingEnglish Language Arts
93.0%
VA avg 74.2% . +1.0pp since 2022
Math
93.0%
VA avg 72.7% . +2.0pp since 2022
What this means: On the SOL, Virginia's statewide test, about 93 of every 100 students at this school read and write at grade level and about 93 of 100 do math at grade level. Across all Virginia schools, those numbers are about 74 and 73. Reading and writing scores are up about 1 points since 2022, while math scores are up about 2 points.
SOL results by year
| School year | English Language Arts | Math |
|---|---|---|
| 2024-25 | 93.0% | 93.0% |
| 2023-24 | 90.0% | 92.0% |
| 2022-23 | 92.0% | 91.0% |
% Passing, all students and all tested grades.
Source: SOL. All students, all grades. See all years and grades →
BeatsExpectations
Demographically-adjusted score · methodologyTier
AS EXPECTED
Performing as predicted given the school's student profile
Actual proficiency
91.2%
composite math + reading, all grades
Predicted
82.8%
based on VA schools with similar FRL share
Beats by
+8.4pp
above demographic expectation
What this means: About 91% of students here test proficient in math and reading, compared with the roughly 83% typical for Virginia schools with a similar share of low-income students. BeatsExpectations measures results against demographically similar schools rather than by raw scores, and this school falls within the typical range, neither among Virginia's top nor bottom 10%.
BeatsExpectations runs a per-state regression of proficiency on free/reduced-lunch share, then scores each school by residual. How this is calculated →
Where Rocky Run Middle ranks
Among middle schools| Measure | This school | In Virginia | In Fairfax County |
|---|---|---|---|
| State test proficiency ranked highest first | 91.2% | #6 of 337 | #2 of 22 |
| Math proficiency ranked highest first | 93.0% | #6 of 342 | #3 of 23 |
| Reading proficiency ranked highest first | 93.0% | #5 of 342 | #3 of 23 |
| Enrollment ranked largest first | 882 | #113 of 343 | #16 of 23 |
| Students per teacher ranked fewest first | 15.2:1 | #275 of 327 | #23 of 23 |
| Diversity index ranked most diverse first | 69.8% | #62 of 333 | #11 of 23 |
| Enrollment change since 2017-18 ranked steepest decline first | -33.3% | #8 of 224 | #1 of 18 |
Ranked against other public middle schools. Online schools are left out of every list, and test-score lists leave out schools that serve specialized populations. Each rank links to the full list.
7-year change
SY 2017-18 vs SY 2024-25Enrollment
882
-440 (-33%) vs 2017
Student : Teacher
15.2:1
was 16.7:1
% White
34%
was 32%
% Hispanic
16%
was 11%
% Black
5%
was 4%
% Asian
40%
was 47%
Source: NCES Common Core of Data
Enrollment and staffing by year
| School year | Students | Teachers (FTE) | Students per teacher | Free or reduced lunch |
|---|---|---|---|---|
| 2024-25 | 882 | 58 | 15.2:1 | 20% (173) |
| 2023-24 | 886 | 67.1 | 13.2:1 | 21% (184) |
| 2022-23 | 936 | 60 | 15.6:1 | 19% (176) |
| 2017-18 | 1,322 | 79.4 | 16.7:1 | 12% (165) |
Source: NCES Common Core of Data. Rows are the federal collections on file for Rocky Run Middle.
About Rocky Run Middle
At 4400 Stringfellow Rd in Chantilly, Virginia, Rocky Run Middle operates as a mid-sized middle school. Federal data show 882 students enrolled in grades 7 through 8 in 2024-25.
Rocky Run Middle reports to Fairfax County Public Schools, which has 199 schools and 179,323 students.
Of every 100 students at Rocky Run Middle, about 40 are Asian, the largest group. Other students are 34% White, 16% Hispanic, 5% Black, and 5% multiracial. That is higher than the 20% Asian share among all Fairfax County residents. A diversity index of 70% means there is a 70% chance two randomly chosen students at Rocky Run Middle are from different groups.
Rocky Run Middle reports a ratio of 15.2 students per teacher, from 58 full-time-equivalent teachers. By comparison, the average for middle schools in Virginia is 13.1:1. Student poverty is often measured by lunch eligibility; at Rocky Run Middle, 20% qualify for free or reduced-price lunch. The gap from the 37% average for public schools in Fairfax County is 17 points.
On the allk12 BeatsExpectations measure, Rocky Run Middle is 8.4 points above the average proficiency rate across its state test results predicted for its free or reduced-price lunch share: 91.2% actual, 82.8% predicted. That is outside both the top and bottom 10% in Virginia.
In the surrounding county, Fairfax County, the median household earns about $153,637 a year, 65% of adults hold a bachelor's degree or higher, and about 4% of residents live below the federal poverty line. Counting Rocky Run Middle, Fairfax County has 222 public schools.
Rocky Run Middle's closest public school neighbor is Greenbriar West Elementary, about 0.3 miles away. Counting only straight-line distance, at least 8 other public schools are within five miles. In a group of 9 nearby schools with scores, Rocky Run Middle ranks 2nd on average proficiency.
For locale, NCES codes Rocky Run Middle as Suburb: Large.
From 1,322 students in 2017-18, enrollment fell to 882 by 2024-25. In 2017-18, 47% of students were Asian; in 2024-25, 40% were. Over the same period, the student-to-teacher ratio dropped to 15.2:1, from 16.7:1.
The Rocky Run Middle discussion page is a place for homework, tutoring, and testing dates. You can also rate the school on this page.
Fairfax County at a glance
View full county profilePopulation
1,147,837
Census ACS
Median income
$153,637
Household, ACS
Bachelor's+
65%
Adults 25+
Poverty rate
4%
Below federal line
Schools in county
222
174,475 students
Quick facts
Related schools
Other schools in Fairfax County Public Schools
- Lake Braddock SecondaryHigh · 4,411 students
- Robinson SecondaryHigh · 3,710 students
- Hayfield SecondaryHigh · 3,256 students
- Chantilly HighHigh · 2,937 students
- West Springfield HighHigh · 2,799 students
- Westfield HighHigh · 2,737 students
Other schools in Chantilly
- Chantilly HighHigh · 2,937 students
- Westfield HighHigh · 2,737 students
- J. Michael Lunsford MiddleMiddle · 1,182 students
- Franklin MiddleMiddle · 798 students
- Brookfield ElementaryElementary · 684 students
- Poplar Tree ElementaryElementary · 683 students
Nearby schools
- Greenbriar West Elementary0.3 mi · 630
- Chantilly High0.5 mi · 2,937
- Brookfield Elementary0.7 mi · 684
- Poplar Tree Elementary0.8 mi · 683
- Greenbriar East Elementary0.9 mi · 922
- Lees Corner Elementary1.1 mi · 547
Frequently asked questions
About Rocky Run MiddleHow many students attend Rocky Run Middle?
Rocky Run Middle enrolls approximately 882 students in grades 07-08.
What age range does Rocky Run Middle serve?
Rocky Run Middle serves students from grade 07 through grade 08.
How many students per teacher at Rocky Run Middle?
Approximately 15.2:1 students per teacher at Rocky Run Middle.
How diverse is Rocky Run Middle?
Rocky Run Middle reports a student body of 34% White, 16% Hispanic, 5% Black, 40% Asian, 5% Two or more.
Who oversees Rocky Run Middle?
Rocky Run Middle is overseen by Fairfax County Public Schools in Fairfax County.
Data sourceSchool profile facts are sourced from the NCES. Community content is posted by allk12 members.