Enrollment
357
Virginia · 2024-25 NCES data
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 →
Teachers (FTE)
33.0
Federal CCD staff survey
Students per teacher
10.8:1
vs 13.9:1 Virginia avg
-22% vs state
Free-lunch eligible
16.6%
vs 57.6% Virginia avg
-71% vs state
Student-teacher ratio in context
How Armstrong Elementary compares with Virginia and U.S. medians
What stands out at Armstrong Elementary
Armstrong Elementary is a lower-poverty, mid-sized combined-grade school in Reston, Virginia, enrolling 357 students.
Classes run notably small here: at 10.8:1, Armstrong Elementary is leaner than roughly 89% of Virginia schools and 22% under the state's 13.9:1 norm, more adult attention per pupil than most peers.
Comparatively few students face economic hardship here, 16.6% free-meal eligibility runs 71% below the Virginia average.
Enrollment of 357 puts it in the smaller third of Virginia schools by headcount.
Its Resource Investment Index lands in the upper third of 1,868 scored Virginia schools.
Against 75 statewide peers matched on enrollment and economic need, it ranks mid-pack at #38.
Its student body is led by White (60%) and Hispanic or Latino (15%) (diversity index 60/100).
Counselor availability sits well past the ASCA benchmark, roughly 357 students sharing each counselor, though short of the most stretched campuses.
13.2% of students were chronically absent in the 2021-22 collection, in line with the post-pandemic national range.
The surrounding Fairfax County Public Schools spends $17,977 per pupil, 23% above the Virginia average, a better-resourced district than most.
Among Reston's public schools, it stands alongside Dogwood Elementary (745 students): Armstrong Elementary is smaller than that campus by headcount and runs leaner classes (10.8:1 vs 14.1:1).
Fairfax County Public Schools also operates Lake Braddock Secondary (4,411 students) and Robinson Secondary (3,710 students) alongside Armstrong Elementary.
Sourced from NCES CCD, CRDC, and F-33 (federal records, not a quality verdict). How we source and compute this.
Source: National Center for Education Statistics Common Core of Data + CRDC + F-33 · 2024-25
How Armstrong Elementary compares
Armstrong Elementary on the metrics families compare, against 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 (what these measure)
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
$17,977
per pupil, district-wide
- above Virginia avg of $14,649
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.
Overview
- Common Core of Data (June 2026): enrollment, staffing, and the student-teacher ratio above.
- Civil Rights Data Collection: discipline counts and program access (AP, gifted, special education).
- F-33 School District Finance Survey: the district-wide per-pupil spending figures below.
Three separate federal collections, each on its own reporting cadence - which is why this school's numbers line up on a consistent basis against every other school and state on this site, rather than mixing figures pulled from different survey years.
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
Funding & spending
District-wide per-pupil expenditure for Fairfax County Public Schools, which includes Armstrong Elementary.
$17,977
Per student
+23%
vs Virginia
Avg $14,649
+8%
vs U.S.
Avg $16,593
Revenue mix
Local 66.6%
State 23.3%
Federal 10.1%
Source: NCES F-33 School District Finance Survey District-level finance · FY 2021-22 Per-pupil expenditure reflects the district-wide average. Individual school budgets are not reported at the federal level.
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
- 4,411
- Students per teacher
- 17:1
- Resource Index
- 57/100
- 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
Similar other schools statewide
Matched by enrollment size and by staffing ratio across all of Virginia, not just this city - a different peer set than the local comparisons above.
Similar enrollment (~357 students)
Similar student-teacher ratio (~10.8:1)
Next steps
Verify locally before acting on Armstrong Elementary's federal record.
- Compare Armstrong Elementary against another school. Compare schools
- Fairfax County Public Schools's spending and staffing shape this school. District profile
- Confirm current enrollment and boundaries with the school. Choosing guide
Federal record (CCD 2024-25, CRDC 2021-22) - PlainSchools assigns no subjective rating; the composite quality score is a transparent, reproducible index computed from this cited federal data.
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.
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, counselor availability, attendance rates. 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.
Is Armstrong Elementary a good school?
Armstrong Elementary earns 56/100 on the Resource Investment Index, with class sizes smaller than 89% of Virginia schools. This is a resource snapshot, not an academic rating; see the Resource Investment Index question above for what the number does and doesn't measure.
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.
Related tools
Every figure on PlainSchools is rendered directly from the source NCES, CRDC and F-33 federal records, no number is typed in by an editor. Each school's figures reflect its most recent NCES/CRDC submission on file. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of June 2026.