- Enrollment
- 4,411
- Students per teacher
- 17:1
- Resource Index
- 57/100
Middle school (grades 6-8) · Chantilly, VA
Rocky Run Middle
Federal NCES profile for Rocky Run Middle, including enrollment, faculty, free-lunch eligibility, demographics, and resource indicators - Resource Investment Index 63/100.
2024-25 NCES dataMiddle school (grades 6-8)NCES 510126001841
👥 S:T ratio 41
🌟 Gifted program 70
🎓 Counselors 65
📋 Attendance 76
Scored 0–100 from federal NCES and CRDC indicators, resource allocation, not test scores. Full methodology →
The verdict
Rocky Run Middle earns 63/100 on the Resource Investment Index, with class sizes near the Virginia median.
- #1 of 3
- middle schools in Chantilly · Resource Index
- 63
- Resource Index · Higher
- 14.7:1
- students per teacher
- 16.5%
- free-lunch eligible
Rocky Run Middle has class sizes near the Virginia median. Computed live against every Virginia school reporting to NCES.
By Resource Investment Index, Rocky Run Middle ranks #1 of 3 middle schools in Chantilly, VA.
School address
District: Fairfax County Public Schools · Virginia
NCES ID 510126001841 Verify on NCES CCD record →
CCD year-over-year · 2022-23 → 2023-24
-50 students YoY
Rocky Run Middle shrank from 936 students in 2022-23 to 886 in 2023-24 (-5.3%).
Teacher FTE added 60.0 → 67.1 across the same CCD years.
Source: NCES Common Core of Data public-school universe (2022-23, 2023-24).
Shrinking CCD campus
-50 students YoY 510126001841 · Chantilly, VA Middle · MID · TRAD
882 enr · 14.7:1 · 16.5% lunch · RII 63
Nearest enrollment peer: Lake Braddock Secondary (4,411 students)
Rocky Run Middle shrank from 936 students in 2022-23 to 886 in 2023-24 (-5.3%). Teacher FTE added 60.0 → 67.1 across the same CCD years. Read with this school → · District book → · Virginia schools → · Find another →
Rocky Run Middle in the enrollment neighbourhood
Fall enrollment among this campus and nearest district peers
- Lake Braddock
Lake Braddock Secondary
4,411 students
- Robinson Secon
Robinson Secondary
3,710 students
- Hayfield Secon
Hayfield Secondary
3,256 students
- Chantilly High
Chantilly High
2,937 students
- West Springfie
West Springfield High
2,799 students
- This school 882
Rocky Run Middle
882 students
What this shows Rocky Run Middle reports 882 students on the CCD universe file.
How Rocky Run Middle compares
Rocky Run Middle is a shrinking campus on CCD: ratios and free-lunch share vs Virginia and U.S. means.
| Metric | This school | vs Virginia | Virginia avg | U.S. avg |
|---|---|---|---|---|
| Students per teacher | 14.7:1 | ▲ 6% | 13.9:1 | 15.7:1 |
| Free-lunch eligible | 16.5% | ▼ 71% | 57.6% | 51.7% |
| Enrollment | 882 | top 19% | - | - |
Source: NCES Common Core of Data School-level CCD + state/national means from Public School Universe · 2024-25
14.7:1
Leaner classes than 50% of US schools, a middle-of-the-pack class size.
882
Bigger than 88% of US schools by enrollment, a large campus nationally.
Equity indicators methodology
Economic need
16.5%
free-lunch eligible
- 71% below the Virginia average of 57.6%
Below the 40% Title I threshold, among the lower-need profiles in the state; federal aid targets individual qualifying students rather than schoolwide programs.
Staffing depth
14.7:1
students per teacher
- 6% above state mean
Top 64% in Virginia - lower ratio than 36% of state schools
Close to the 15:1 benchmark most often cited for individualized attention.
Engagement
9.5%
chronically absent (missed 10%+ of school days)
In the 5-10% range, close to the pre-pandemic national baseline.
Funding equity
$18,975
per pupil, district-wide
- above Virginia avg of $15,892
Somewhat above the U.S. public-school average, reflecting higher local or state investment per enrolled student.
Support staff
Counselors5.0 FTE
Per 176 students, the combined health-and-guidance staffing load for this school.
Discipline context
25
in-school suspensions + 8 out-of-school
Suspension rate: 2.8 per 100 students. Combined in-school and out-of-school rate: 3.7 per 100 students. Reported via the Civil Rights Data Collection. Includes 1 expulsion.
Student demographics
Asian 39.7%
White 33.6%
Hispanic or Latino 16.4%
African American 5.4%
Two or More 4.6%
Native Hawaiian / Pacific Islander 0.2%
Largest group: Asian at 39.7% of enrollment.
Student-body diversity index 69.8/100
Simpson diversity index - at 69.8, Rocky Run Middle is more mixed than the Virginia school average of 53.7.
Programs
Gifted & talented Yes
District finance for Fairfax County Public Schools reports $18,975 per pupil (NCES F-33) - open the district page for the full revenue mix.
How Rocky Run Middle Compares to District-Mates
| School | Enrollment | Economic Profile | Student-Teacher Ratio |
|---|---|---|---|
| Lake Braddock Secondary | Larger | Similar economic need | Higher S:T ratio |
| Robinson Secondary | Larger | Similar economic need | Higher S:T ratio |
| Hayfield Secondary | Larger | Similar economic need | Higher S:T ratio |
| Chantilly High | Larger | Similar economic need | Higher S:T ratio |
| West Springfield High | Larger | Similar economic need | Higher S:T ratio |
Comparisons are relative to Rocky Run Middle's own figures; each column derives from NCES Common Core of Data.
Other Schools in This District
- Enrollment
- 3,710
- Students per teacher
- 17.1:1
- Resource Index
- 54/100
- Enrollment
- 3,256
- Students per teacher
- 17.3:1
- Resource Index
- 53/100
- Enrollment
- 2,937
- Students per teacher
- 16.2:1
- Resource Index
- 47/100
- Enrollment
- 2,799
- Students per teacher
- 18.5:1
- Resource Index
- 45/100
Similar middle schools in Chantilly
2 comparable middle schools (grades 6-8) serving the same city.
Nationwide middle schools with similar size or staffing
Out-of-state peers matched by enrollment and by student-teacher ratio, not the same-city or same-district lists above.
Similar enrollment (~882 students)
Frequently asked questions about Rocky Run Middle
How many students attend Rocky Run Middle?
Rocky Run Middle has 882 students enrolled. It is a middle school in Chantilly, VA. CCD year-over-year: 936 (2022-23) → 886 (2023-24), down 50.
What is the student-teacher ratio at Rocky Run Middle?
The student-teacher ratio at Rocky Run Middle is 14.7:1, which is 6% higher than the Virginia average of 13.9:1 and 6% lower than the national average of 15.7:1.
What percentage of students receive free lunch at Rocky Run Middle?
16.5% of students at Rocky Run Middle are eligible for free lunch, compared to the Virginia average of 57.6%.
What is the racial and ethnic makeup of Rocky Run Middle?
The largest demographic group at Rocky Run Middle is Asian at 39.7% of enrollment, in Chantilly, VA. Its student body is more racially and ethnically mixed than most US schools, with a diversity index of 69.8/100.
What is the Resource Investment Index for Rocky Run Middle?
Rocky Run Middle has a Resource Investment Index of 63/100 (higher reported resources relative to schools nationally) based on 4 factors: student-teacher ratio, gifted-program reporting, counselor availability, chronic absenteeism. Not a test-score or academic measure (national median ~41/100, see methodology).
How does Rocky Run Middle rank among middle schools in Chantilly?
By Resource Investment Index, Rocky Run Middle ranks #1 of 3 middle schools in Chantilly, VA. This compares federal resource and staffing data among local peers; it is not a test-score or academic ranking. See all middle schools in Chantilly on the city page.
What other schools are in Fairfax County Public Schools?
Besides Rocky Run Middle, Fairfax County Public Schools also operates Lake Braddock Secondary (4,411 students), Robinson Secondary (3,710 students), and Hayfield Secondary (3,256 students). See the Fairfax County Public Schools district page for the complete list.