- Enrollment
- 4,411
- Students per teacher
- 17:1
- Resource Index
- 57/100
Other / mixed grade configuration · Reston, VA
Armstrong Elementary
Federal NCES profile for Armstrong Elementary, including enrollment, faculty, free-lunch eligibility, demographics, and resource indicators - Resource Investment Index 56/100.
2024-25 NCES dataOther / mixed grade configurationNCES 510126002058
👥 S:T ratio 57
🌟 Gifted program 70
🎓 Counselors 29
📋 Attendance 67
Scored 0–100 from federal NCES and CRDC indicators, resource allocation, not test scores. Full methodology →
The verdict
Armstrong Elementary earns 56/100 on the Resource Investment Index, with class sizes smaller than 89% of Virginia schools.
- #4 of 8
- schools in Reston · Resource Index
- 56
- Resource Index · Higher
- 10.8:1
- small classes for Virginia
- 16.6%
- free-lunch eligible
Armstrong Elementary has class sizes smaller than 89% of Virginia schools. Computed live against every Virginia school reporting to NCES.
By Resource Investment Index, Armstrong Elementary ranks #4 of 8 schools in Reston, VA.
School address
District: Fairfax County Public Schools · Virginia
NCES ID 510126002058 Verify on NCES CCD record →
CCD year-over-year · 2022-23 → 2023-24
+4 students YoY
Armstrong Elementary held near 365 students from 2022-23 to 2023-24 (+4 headcount).
Teacher FTE held 33.3 → 33.2 across the same CCD years.
Source: NCES Common Core of Data public-school universe (2022-23, 2023-24).
Steady CCD campus
+4 students YoY 510126002058 · Reston, VA Other · SMALL · TRAD
357 enr · 10.8:1 · 16.6% lunch · RII 56
Nearest enrollment peer: Lake Braddock Secondary (4,411 students)
Armstrong Elementary held near 365 students from 2022-23 to 2023-24 (+4 headcount). Teacher FTE held 33.3 → 33.2 across the same CCD years. Read with this school → · District book → · Virginia schools → · Find another →
Armstrong Elementary 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 357
Armstrong Elementary
357 students
What this shows Armstrong Elementary reports 357 students on the CCD universe file.
How Armstrong Elementary compares
Armstrong Elementary held steady on CCD headcount: ratios and free-lunch share vs Virginia and U.S. means.
| Metric | This school | vs Virginia | Virginia avg | U.S. avg |
|---|---|---|---|---|
| Students per teacher | 10.8:1 | ▼ 22% | 13.9:1 | 15.7:1 |
| Free-lunch eligible | 16.6% | ▼ 71% | 57.6% | 51.7% |
| Enrollment | 357 | top 79% | - | - |
Source: NCES Common Core of Data School-level CCD + state/national means from Public School Universe · 2024-25
10.8:1
Leaner classes than 84% of US schools, among the more generously staffed nationally.
357
Bigger than 41% of US schools by enrollment, mid-sized for the country.
Equity indicators methodology
Economic need
16.6%
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
10.8:1
students per teacher
- 22% below state mean
Top 11% in Virginia - lower ratio than 89% of state schools
Well under the widely cited 15:1 individualized-attention benchmark, among the leaner class loads nationally.
Engagement
13.2%
chronically absent (missed 10%+ of school days)
In the 10-15% range, above the pre-pandemic national baseline but within the broader post-pandemic picture.
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
Counselors1.0 FTE
Per 357 students, the combined health-and-guidance staffing load for this school.
Discipline context
0
in-school suspensions + 9 out-of-school
Suspension rate: 0.0 per 100 students. Combined in-school and out-of-school rate: 2.5 per 100 students. Reported via the Civil Rights Data Collection.
Student demographics
White 60.2%
Hispanic or Latino 15.1%
African American 8.4%
Two or More 8.4%
Asian 7.3%
American Indian / Alaska Native 0.6%
Largest group: White at 60.2% of enrollment.
Student-body diversity index 59.5/100
Simpson diversity index - at 59.5, Armstrong Elementary 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 Armstrong Elementary 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 Armstrong Elementary'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 other schools in Reston
6 comparable other schools (grades Mixed) serving the same city.
Dogwood Elementary
Standard public school
745 students 14.1:1 students per teacher
Hunters Woods Elementary School for the Arts and Sciences
Standard public school
726 students 16.1:1 students per teacher
Lake Anne Elementary
Standard public school
616 students 14:1 students per teacher
Terraset Elementary
Standard public school
598 students 13.3:1 students per teacher
Sunrise Valley Elementary
Standard public school
558 students 14.3:1 students per teacher
Aldrin Elementary
Standard public school
455 students 11.1:1 students per teacher
Nationwide other 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 (~357 students)
Frequently asked questions about Armstrong Elementary
How many students attend Armstrong Elementary?
Armstrong Elementary has 357 students enrolled. It is a public school in Reston, VA. CCD year-over-year: 361 (2022-23) → 365 (2023-24), nearly flat (+4).
What is the student-teacher ratio at Armstrong Elementary?
The student-teacher ratio at Armstrong Elementary is 10.8:1, which is 22% lower than the Virginia average of 13.9:1 and 31% lower than the national average of 15.7:1. Lower ratios generally mean more individual attention per student.
What percentage of students receive free lunch at Armstrong Elementary?
16.6% of students at Armstrong Elementary are eligible for free lunch, compared to the Virginia average of 57.6%.
What is the racial and ethnic makeup of Armstrong Elementary?
The largest demographic group at Armstrong Elementary is White at 60.2% of enrollment, in Reston, VA. Its student body is more racially and ethnically mixed than most US schools, with a diversity index of 59.5/100.
What is the Resource Investment Index for Armstrong Elementary?
Armstrong Elementary has a Resource Investment Index of 56/100 (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 Armstrong Elementary rank among schools in Reston?
By Resource Investment Index, Armstrong Elementary ranks #4 of 8 schools in Reston, VA. This compares federal resource and staffing data among local peers; it is not a test-score or academic ranking. See all schools in Reston on the city page.
What other schools are in Fairfax County Public Schools?
Besides Armstrong Elementary, 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.