2024-25 NCES data Other / mixed grade configuration NCES 510126002060

Union Mill Elementary — Clifton, VA

Federal NCES profile for Union Mill Elementary, including enrollment, faculty, free-lunch eligibility, demographics, and resource indicators — Resource Investment Index 48/100.

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0/100100/10048/100
👥 Class size
31
🌟 Gifted program
70
🎓 Counselors
13
📋 Attendance
78
How this works: Each indicator above is scored 0–100 from federal NCES and CRDC data, then averaged into the Resource Investment Index. This measures resource allocation — staffing, programs, and support services — not standardized test scores or academic outcomes. Full methodology →

The verdict

Union Mill Elementary earns a D Resource Investment Index (48/100), with class sizes larger than 93% of Virginia schools.

D
Resource Index · 48/100
17.2:1
large classes for Virginia
10.4%
free-lunch eligible
874
students enrolled

School address

Clifton, VA 20124
District: Fairfax County Public Schools · Virginia

Public location data per NCES (National Center for Education Statistics) Common Core of Data. Verify the school's current address on the NCES CCD record.

Enrollment

874

Virginia · 2024-25 NCES data

Teachers (FTE)

52.0

Federal CCD staff survey

Students per teacher

17.2:1

vs 14:1 Virginia avg

+23% vs state

Free-lunch eligible

10.4%

vs 59.9% Virginia avg

-83% vs state

Student-teacher ratio in context

How Union Mill Elementary compares with Virginia and U.S. medians

Larger classes than state median
0:135:117.2:1

Source: NCES Common Core of Data As of 2024-25 federal staff survey Total enrollment ÷ full-time-equivalent classroom teachers

The federal record — no proprietary index, no editorial formula. PlainSchools publishes the actual federal measurements — enrollment, staffing, demographics, discipline, and finance — straight from the NCES Common Core of Data, CRDC, and F-33 surveys. No composite rating, no opinion-based score on top. You get the same raw numbers researchers and policymakers use, with benchmarks, spending context, and equity indicators computed from the same federal datasets. Full methodology linked below.

What this school's NCES data tells you

Union Mill Elementary reports 874 enrolled students to the National Center for Education Statistics (NCES) alongside 52.0 full-time-equivalent teachers, producing a 17.2:1 student-teacher ratio. That figure sits 23% above the Virginia state mean of 14:1, signalling larger average class loads than peers in the same state. Against the national 2024-25 average of 15.7:1, it is 10% higher, a useful calibration for families comparing districts across state lines.

Title I and federal lunch eligibility offer another window into the student body: 10.4% of pupils qualify for free meals, a proxy for household income that federal programs use to direct funding. The free-lunch share is 83% below the Virginia average and 80% below the national baseline. Counselor coverage works out to roughly 437 students per counselor, above the ASCA-recommended ceiling of 250:1. Chronic absenteeism — missing 10% or more of school days — stands at 9.0% according to the 2021-22 Civil Rights Data Collection.

On the finance side, the surrounding Fairfax County Public Schools spends $17,977 per pupil district-wide, above the Virginia average of $14,649 and above the national average of $16,593. Revenue comes 66.6% from local sources (property taxes), 23.3% from the state, and 10.1% from federal programs per the NCES F-33 finance survey. Taken together, these measurements produce a Resource Investment Index of 48/100 (D), calculated from 4 distinct NCES and CRDC indicators measuring resource allocation rather than academic outcomes.

Source: National Center for Education Statistics Common Core of Data + CRDC + F-33 · 2024-25

How Union Mill Elementary compares

Cross-validating school-level NCES values against Virginia state and U.S. national means lets readers see whether this school is an outlier or in line with peers.

Metric This school vs Virginia Virginia avg U.S. avg
Students per teacher 17.2:1 ▲ 23% 14:1 15.7:1
Free-lunch eligible 10.4% ▼ 83% 59.9% 51.8%
Enrollment 874 top 81% — —

Source: NCES Common Core of Data School-level CCD + state/national means from Public School Universe · 2024-25

Class size vs. every US school

Students per teacher (lower means more individual attention)

17 smaller classes than 29% of 92,598 US schools

0–2: 295 US schools (0%). Below this entry. 2–4: 597 US schools (1%). Below this entry. 4–6: 1,033 US schools (1%). Below this entry. 6–8: 1,939 US schools (2%). Below this entry. 8–10: 4,805 US schools (5%). Below this entry. 10–12: 11,082 US schools (12%). Below this entry. 12–14: 16,971 US schools (18%). Below this entry. 14–16: 18,959 US schools (20%). Below this entry. 16–18: 13,660 US schools (15%). This entry sits in this band. 18–20: 8,300 US schools (9%). Above this entry. 20–22: 5,448 US schools (6%). Above this entry. 22–24: 4,007 US schools (4%). Above this entry. 24–26: 2,663 US schools (3%). Above this entry. 26–28: 1,131 US schools (1%). Above this entry. 28–30: 504 US schools (1%). Above this entry. 30–32: 307 US schools (0%). Above this entry. 32–34: 189 US schools (0%). Above this entry. 34–36: 141 US schools (0%). Above this entry. 36–38: 93 US schools (0%). Above this entry. 38–40: 94 US schools (0%). Above this entry. 40–42: 59 US schools (0%). Above this entry. 42–44: 46 US schools (0%). Above this entry. 44–46: 56 US schools (0%). Above this entry. 46–48: 58 US schools (0%). Above this entry. 48–50: 34 US schools (0%). Above this entry. 50–52: 37 US schools (0%). Above this entry. 52–54: 30 US schools (0%). Above this entry. 54–56: 15 US schools (0%). Above this entry. 56–58: 25 US schools (0%). Above this entry. 58–60: 20 US schools (0%). Above this entry. This school 0 60 every US school, by class size, bucketed by value

Each bar is a band; taller bars hold more US schools. The dashed line + filled bar mark this entry. Hover or tap any bar for its full count, share, and where it sits relative to this entry.

Source U.S. Department of Education — NCES Common Core of Data · 2024-25

School size vs. every US school

Total enrollment — where this school sits by size (neither large nor small is 'better')

874 larger than 88% of 95,891 US schools

0–150: 14,035 US schools (15%). Below this entry. 150–300: 16,928 US schools (18%). Below this entry. 300–450: 21,633 US schools (23%). Below this entry. 450–600: 17,006 US schools (18%). Below this entry. 600–750: 10,042 US schools (10%). Below this entry. 750–900: 5,568 US schools (6%). This entry sits in this band. 900–1,050: 3,006 US schools (3%). Above this entry. 1,050–1,200: 1,826 US schools (2%). Above this entry. 1,200–1,350: 1,220 US schools (1%). Above this entry. 1,350–1,500: 908 US schools (1%). Above this entry. 1,500–1,650: 692 US schools (1%). Above this entry. 1,650–1,800: 607 US schools (1%). Above this entry. 1,800–1,950: 502 US schools (1%). Above this entry. 1,950–2,100: 432 US schools (0%). Above this entry. 2,100–2,250: 346 US schools (0%). Above this entry. 2,250–2,400: 252 US schools (0%). Above this entry. 2,400–2,550: 203 US schools (0%). Above this entry. 2,550–2,700: 163 US schools (0%). Above this entry. 2,700–2,850: 115 US schools (0%). Above this entry. 2,850–3,000: 85 US schools (0%). Above this entry. This school 0 3,000 every US school, by enrollment, bucketed by value

Each bar is a band; taller bars hold more US schools. The dashed line + filled bar mark this entry. Hover or tap any bar for its full count, share, and where it sits relative to this entry.

Source U.S. Department of Education — NCES Common Core of Data · 2024-25

What the federal data reveals about equity at this school

Federal measurements — not ratings — surface the resource and opportunity picture. Below are the indicators that researchers, civil-rights monitors, and funding formulas use to assess equity.

Economic need
10.4%
free-lunch eligible — 83% below the Virginia average of 59.9%
Below the 40% Title I threshold — federal aid targets individual qualifying students rather than schoolwide programs.
Staffing depth
17.2:1
students per teacher — 23% above state mean
Top 93% in Virginia — lower ratio than 7% of state schools
Between 15:1 and 20:1 — in line with the typical U.S. public-school staffing range.
Engagement
9.0%
chronically absent (missed 10%+ of school days)
Below 10% — strong attendance relative to the post-pandemic national landscape.
Funding equity
$17,977
per pupil, district-wide — above Virginia avg of $14,649
Above the U.S. public-school average, reflecting higher local or state investment per enrolled student.
Support staff
Counselors2.0 FTE
Per 437 students — the combined health-and-guidance staffing load for this school.
Discipline context
6
in-school suspensions + 6 out-of-school
Suspension rate: 0.7 per 100 students. Combined in-school and out-of-school rate: 1.4 per 100 students. Reported via the Civil Rights Data Collection.

Overview

Enrollment 874 Top 81% in Virginia — larger than 19% of 1,869 state schools
Teachers (FTE) 52.0
Students per teacher 17.2:1 +23% vs state
Free-lunch eligible 10.4% -83% vs state
NCES ID 510126002060

Student demographics

White 59.4%
Asian 16.2%
Hispanic or Latino 10.6%
Two or More 8.8%
African American 4.8%
Native Hawaiian / Pacific Islander 0.1%

Largest group: White at 59.4% of enrollment.

Programs & staff

Gifted & talented Yes
Counselors (FTE) 2.0
Students per counselor 437:1

Discipline & special education

Chronically absent 9.0%
In-school suspensions 6
Out-of-school suspensions 6

Funding & spending

District-wide per-pupil expenditure for Fairfax County Public Schools, which includes Union Mill 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.

Other Schools in This District

Fairfax County Public Schools · 5 sibling schools

View district profile

Educator & family resources

In-depth guides on understanding NCES data, school choice, and education funding.

Understanding NCES data

How CCD, CRDC and EDFacts feed every public-school number you see.

Choose a school district

Eight signals that matter more than the overall ranking number.

How schools are funded

Title I, F-33, state aid formulas and what per-pupil spending really means.

Chronic absenteeism

Why missing 10% of school matters and how it varies by district.

Magnet vs charter vs traditional

Three school types, three funding models, three sets of trade-offs.

School discipline data

What CRDC suspension and expulsion records do and don't reveal.

Frequently asked questions about Union Mill Elementary

How many students attend Union Mill Elementary?

Union Mill Elementary has 874 students enrolled. It is a other school in Clifton, VA.

What is the student-teacher ratio at Union Mill Elementary?

The student-teacher ratio at Union Mill Elementary is 17.2:1, which is 23% higher than the Virginia average of 14:1 and 10% higher than the national average of 15.7:1.

What percentage of students receive free lunch at Union Mill Elementary?

10.4% of students at Union Mill Elementary are eligible for free lunch, compared to the Virginia average of 59.9%.

What is the racial and ethnic makeup of Union Mill Elementary?

The largest demographic group at Union Mill Elementary is White at 59.4%. The school serves a diverse student body in Clifton, VA.

What is the Resource Investment Index for Union Mill Elementary?

Union Mill Elementary has a Resource Investment Index of 48/100 (D) based on 4 factors: student-teacher ratio, counselor availability, attendance rates. This index measures federal resource allocation — staffing levels, program availability, and support services — not standardized test scores or academic outcomes.

Is Union Mill Elementary a good school?

Union Mill Elementary earns a D Resource Investment Index (48/100), with class sizes larger than 93% of Virginia schools. The Resource Investment Index reflects staffing, counselor access, gifted programs, and attendance reported to NCES, not test scores or academic outcomes, so treat it as a resource snapshot rather than an overall rating.

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Read our methodology — how this data is sourced, computed, and verified.

Source: National Center for Education Statistics (NCES) CCD + Public School Universe (2024-25), CRDC (2021-22), F-33 District Finance Survey (FY 2021-22) · 2024-25 Data as of the 2024-25 school year. Coverage from U.S. Department of Education NCES Common Core of Data. Varies by entity type — administrative districts and certain charter networks may report only a subset of fields.

All federal data sources used on this page
  • NCES Common Core of Data (CCD) — universe of U.S. public schools and districts. nces.ed.gov/ccd
  • NCES Civil Rights Data Collection (CRDC) — discipline, absenteeism, and AP-course participation. ocrdata.ed.gov
  • NCES F-33 School District Finance Survey — per-pupil expenditure and revenue sources. nces.ed.gov/ccd/f33agency
  • USDA National School Lunch Program (NSLP) — free and reduced-price lunch eligibility. fns.usda.gov/nslp
  • U.S. Census Bureau ACS — demographic and socioeconomic context for school catchment areas. census.gov/programs-surveys/acs
  • U.S. Department of Education ESSA Title I — federal Title I program participation. ed.gov