Enrollment
927
Virginia · 2024-25 NCES data
Other / mixed grade configuration · Fairfax, VA
Mosaic Elementary
Federal NCES profile for Mosaic Elementary, including enrollment, faculty, free-lunch eligibility, demographics, and resource indicators - Resource Investment Index 49/100.
2024-25 NCES dataOther / mixed grade configurationNCES 510126000539
👥 S:T ratio 35
🌟 Gifted program 70
🎓 Counselors 7
📋 Attendance 83
Scored 0–100 from federal NCES and CRDC indicators, resource allocation, not test scores. Full methodology →
The verdict
Mosaic Elementary earns 49/100 on the Resource Investment Index, with class sizes larger than 85% of Virginia schools.
- #14 of 19
- schools in Fairfax · Resource Index
- 49
- Resource Index · Higher
- 16.3:1
- large classes for Virginia
- 21.7%
- free-lunch eligible
Mosaic Elementary has class sizes larger than 85% of Virginia schools. Computed live against every Virginia school reporting to NCES.
By Resource Investment Index, Mosaic Elementary ranks #14 of 19 schools in Fairfax, VA.
School address
District: Fairfax County Public Schools · Virginia
NCES ID 510126000539 Verify on NCES CCD record →
Teachers (FTE)
57.0
Federal CCD staff survey
Students per teacher
16.3:1
vs 13.9:1 Virginia avg
+17% vs state
Free-lunch eligible
21.7%
vs 57.6% Virginia avg
-62% vs state
Student-teacher ratio in context
How Mosaic Elementary compares with Virginia and U.S. medians
What stands out at Mosaic Elementary
Mosaic Elementary is a mid-sized combined-grade school in Fairfax, Virginia, enrolling 927 students.
Class loads run somewhat heavier than typical: 16.3:1 puts it in the larger third of Virginia schools by student-teacher ratio.
Economic need runs somewhat below the state's typical profile, with 21.7% of students eligible for free meals.
Enrollment of 927 puts it in the larger third of Virginia schools by headcount.
Its Resource Investment Index sits near the middle of the pack among 1,868 scored Virginia schools.
Among 298 similarly sized, similarly resourced-need Virginia schools statewide, it ranks #220, in the lower tier once campus size and economic need are matched.
Its student body is led by White (36%) and Asian (33%) (diversity index 73/100).
Counselor access is stretched at roughly 464 students per counselor, well above the ASCA-recommended 250:1 ceiling.
Attendance holds up well here: only 6.9% of students were chronically absent, below the typical post-pandemic national figure.
The surrounding Fairfax County Public Schools spends $17,977 per pupil, 23% above the Virginia average, a better-resourced district than most.
Among Fairfax's public schools, it stands alongside Robinson Secondary (3,710 students): Mosaic Elementary is smaller than that campus by headcount and runs leaner classes (16.3:1 vs 17.1:1).
Fairfax County Public Schools also operates Lake Braddock Secondary (4,411 students) and Robinson Secondary (3,710 students) alongside Mosaic 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 Mosaic Elementary compares
Mosaic 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 | 16.3:1 | ▲ 17% | 13.9:1 | 15.7:1 |
| Free-lunch eligible | 21.7% | ▼ 62% | 57.6% | 51.7% |
| Enrollment | 927 | top 17% | - | - |
Source: NCES Common Core of Data School-level CCD + state/national means from Public School Universe · 2024-25
16.3:1
Leaner classes than 36% of US schools, a middle-of-the-pack class size.
927
Bigger than 90% of US schools by enrollment, a large campus nationally.
Equity indicators (what these measure)
Economic need
21.7%
free-lunch eligible
- 62% below the Virginia average of 57.6%
Below the 40% Title I threshold; federal aid targets individual qualifying students rather than schoolwide programs.
Staffing depth
16.3:1
students per teacher
- 17% above state mean
Top 85% in Virginia - lower ratio than 15% of state schools
Between 16:1 and 20:1, squarely in the typical U.S. public-school staffing range.
Engagement
6.9%
chronically absent (missed 10%+ of school days)
In the 5-10% range, close to the pre-pandemic national baseline.
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
Counselors2.0 FTE
Per 464 students, the combined health-and-guidance staffing load for this school.
Discipline context
3
in-school suspensions + 4 out-of-school
Suspension rate: 0.3 per 100 students. Combined in-school and out-of-school rate: 0.8 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 35.5%
Asian 32.7%
Hispanic or Latino 16.5%
African American 8.3%
Two or More 6.7%
American Indian / Alaska Native 0.2%
Native Hawaiian / Pacific Islander 0.1%
Largest group: White at 35.5% of enrollment.
Student-body diversity index 72.8/100
Simpson diversity index - at 72.8, Mosaic 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 Mosaic 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 Mosaic Elementary Compares to District-Mates
| School | Enrollment | Economic Profile | Student-Teacher Ratio |
|---|---|---|---|
| Lake Braddock Secondary | Larger | Similar economic need | Similar S:T ratio |
| Robinson Secondary | Larger | Lower economic need | Similar S:T ratio |
| Hayfield Secondary | Larger | Similar economic need | Similar S:T ratio |
| Chantilly High | Larger | Similar economic need | Similar S:T ratio |
| West Springfield High | Larger | Similar economic need | Higher S:T ratio |
Comparisons are relative to Mosaic 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 Fairfax
6 comparable other schools (grades Mixed) serving the same city.
Robinson Secondary
Standard public school
3,710 students 17.1:1 students per teacher
Providence Elementary
Standard public school
954 students 15.6:1 students per teacher
Greenbriar East Elementary
Standard public school
922 students 15.9:1 students per teacher
Mantua Elementary
Standard public school
909 students 15.4:1 students per teacher
Navy Elementary
Standard public school
848 students 15.7:1 students per teacher
Laurel Ridge Elementary
Standard public school
835 students 14.9:1 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 (~927 students)
Similar student-teacher ratio (~16.3:1)
Next steps
Verify locally before acting on Mosaic Elementary's federal record.
- Compare Mosaic 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 Mosaic Elementary
How many students attend Mosaic Elementary?
Mosaic Elementary has 927 students enrolled. It is a public school in Fairfax, VA.
What is the student-teacher ratio at Mosaic Elementary?
The student-teacher ratio at Mosaic Elementary is 16.3:1, which is 17% higher than the Virginia average of 13.9:1 and 4% higher than the national average of 15.7:1.
What percentage of students receive free lunch at Mosaic Elementary?
21.7% of students at Mosaic Elementary are eligible for free lunch, compared to the Virginia average of 57.6%.
What is the racial and ethnic makeup of Mosaic Elementary?
The largest demographic group at Mosaic Elementary is White at 35.5% of enrollment, in Fairfax, VA. Its student body is more racially and ethnically mixed than most US schools, with a diversity index of 72.8/100.
What is the Resource Investment Index for Mosaic Elementary?
Mosaic Elementary has a Resource Investment Index of 49/100 (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 Mosaic Elementary rank among schools in Fairfax?
By Resource Investment Index, Mosaic Elementary ranks #14 of 19 schools in Fairfax, VA. This compares federal resource and staffing data among local peers; it is not a test-score or academic ranking. See all schools in Fairfax on the city page.
Is Mosaic Elementary a good school?
Mosaic Elementary earns 49/100 on the Resource Investment Index, with class sizes larger than 85% 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 Mosaic 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.