Enrollment
393
Missouri · 2024-25 NCES data
Other / mixed grade configuration · St Louis, MO
Mason Elem.
Federal NCES profile for Mason Elem., including enrollment, faculty, free-lunch eligibility, demographics, and resource indicators - Resource Investment Index 49/100.
2024-25 NCES dataOther / mixed grade configurationNCES 292928001930
👥 S:T ratio 44
🌟 Gifted program 70
🎓 Counselors 21
📋 Attendance 62
Scored 0–100 from federal NCES and CRDC indicators, resource allocation, not test scores. Full methodology →
The verdict
Mason Elem. earns 49/100 on the Resource Investment Index, with class sizes larger than 70% of Missouri schools. It is also more racially and ethnically mixed than most Missouri schools.
- #10 of 65
- schools in St Louis · Resource Index
- 49
- Resource Index · Higher
- 14:1
- large classes for Missouri
- 99.2%
- free-lunch eligible
Mason Elem. has class sizes larger than 70% of Missouri schools. Computed live against every Missouri school reporting to NCES.
By Resource Investment Index, Mason Elem. ranks #10 of 65 schools in St Louis, MO.
School address
District: St. Louis City · Missouri
NCES ID 292928001930 Verify on NCES CCD record →
Teachers (FTE)
28.0
Federal CCD staff survey
Students per teacher
14:1
vs 12.8:1 Missouri avg
+9% vs state
Free-lunch eligible
99.2%
vs 46.1% Missouri avg
+115% vs state
Student-teacher ratio in context
How Mason Elem. compares with Missouri and U.S. medians
What stands out at Mason Elem.
Mason Elem. is a high-poverty, mid-sized combined-grade school in St Louis, Missouri, enrolling 393 students.
Class loads run somewhat heavier than typical: 14:1 puts it in the larger third of Missouri schools by student-teacher ratio.
Economic need is high: 99.2% of students qualify for free meals, 115% above the Missouri average, a Title I-weighted population that federal funding formulas prioritise.
With 393 students, its enrollment sits close to the Missouri median campus size.
Its Resource Investment Index sits near the middle of the pack among 2,313 scored Missouri schools.
Against 214 statewide peers matched on enrollment and economic need, it ranks in the upper tier at #45.
Its student body is led by White (43%) and African American (36%), more mixed than most schools in the state (diversity index 67/100).
Counselor availability sits well past the ASCA benchmark, roughly 393 students sharing each counselor, though short of the most stretched campuses.
15.3% of students were chronically absent in the 2021-22 collection, in line with the post-pandemic national range.
The surrounding St. Louis City spends $17,843 per pupil, 38% above the Missouri average, a better-resourced district than most.
Its district draws 16.2% of revenue from federal sources, an above-typical federal share that tends to track a higher-need student population.
St. Louis City also operates Gateway High (860 students) and Roosevelt High (734 students) alongside Mason Elem..
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 Mason Elem. compares
Mason Elem. on the metrics families compare, against Missouri and U.S. means.
| Metric | This school | vs Missouri | Missouri avg | U.S. avg |
|---|---|---|---|---|
| Students per teacher | 14:1 | ▲ 9% | 12.8:1 | 15.7:1 |
| Free-lunch eligible | 99.2% | ▲ 115% | 46.1% | 51.7% |
| Enrollment | 393 | top 36% | - | - |
Source: NCES Common Core of Data School-level CCD + state/national means from Public School Universe · 2024-25
14:1
Leaner classes than 57% of US schools, a middle-of-the-pack class size.
393
Bigger than 46% of US schools by enrollment, mid-sized for the country.
Equity indicators (what these measure)
Economic need
99.2%
free-lunch eligible
- 115% above the Missouri average of 46.1%
Well above the 40% Title I schoolwide threshold, among the highest-need profiles in the state; federal funds support the whole school, not individual students.
Staffing depth
14:1
students per teacher
- 9% above state mean
Top 70% in Missouri - lower ratio than 30% of state schools
Close to the 15:1 benchmark most often cited for individualized attention.
Engagement
15.3%
chronically absent (missed 10%+ of school days)
In the 15-20% range, nearing the "high" absenteeism threshold.
Funding equity
$17,843
per pupil, district-wide
- above Missouri avg of $12,931
Somewhat above the U.S. public-school average, reflecting higher local or state investment per enrolled student.
Support staff
Counselors1.0 FTE
Per 393 students, the combined health-and-guidance staffing load for this school.
Discipline context
19
in-school suspensions + 5 out-of-school
Suspension rate: 4.8 per 100 students. Combined in-school and out-of-school rate: 6.1 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 42.7%
African American 35.9%
Hispanic or Latino 14.0%
Asian 3.1%
Two or More 2.8%
American Indian / Alaska Native 1.3%
Native Hawaiian / Pacific Islander 0.3%
Largest group: White at 42.7% of enrollment.
Student-body diversity index 66.7/100
Simpson diversity index - at 66.7, Mason Elem. is more mixed than the Missouri school average of 31.0.
Programs
Gifted & talented Yes
Funding & spending
District-wide per-pupil expenditure for St. Louis City, which includes Mason Elem..
$17,843
Per student
+38%
vs Missouri
Avg $12,931
+8%
vs U.S.
Avg $16,593
Revenue mix
Local 78.0%
State 5.8%
Federal 16.2%
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 Mason Elem. Compares to District-Mates
| School | Enrollment | Economic Profile | Student-Teacher Ratio |
|---|---|---|---|
| Gateway High | Larger | Similar economic need | Lower S:T ratio |
| Roosevelt High | Larger | Similar economic need | Higher S:T ratio |
| Vashon High | Larger | Similar economic need | Similar S:T ratio |
| Mckinley Class. Leadership Ac. | Larger | Similar economic need | Similar S:T ratio |
| Stix Early Childhood Ctr. | Similar size | Similar economic need | Higher S:T ratio |
Comparisons are relative to Mason Elem.'s own figures; each column derives from NCES Common Core of Data.
Other Schools in This District
- Enrollment
- 860
- Students per teacher
- 11.9:1
- Resource Index
- 45/100
- Enrollment
- 734
- Students per teacher
- 21:1
- Resource Index
- 29/100
- Enrollment
- 621
- Students per teacher
- 15.1:1
- Resource Index
- 42/100
- Enrollment
- 610
- Students per teacher
- 15.3:1
- Resource Index
- 51/100
- Enrollment
- 472
- Students per teacher
- 18.2:1
- Resource Index
- 39/100
Similar other schools statewide
Matched by enrollment size and by staffing ratio across all of Missouri, not just this city - a different peer set than the local comparisons above.
Similar enrollment (~393 students)
Similar student-teacher ratio (~14:1)
Next steps
Verify locally before acting on Mason Elem.'s federal record.
- Compare Mason Elem. against another school. Compare schools
- St. Louis City'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 Mason Elem.
How many students attend Mason Elem.?
Mason Elem. has 393 students enrolled. It is a public school in St Louis, MO.
What is the student-teacher ratio at Mason Elem.?
The student-teacher ratio at Mason Elem. is 14:1, which is 9% higher than the Missouri average of 12.8:1 and 11% lower than the national average of 15.7:1.
What percentage of students receive free lunch at Mason Elem.?
99.2% of students at Mason Elem. are eligible for free lunch, compared to the Missouri average of 46.1%.
What is the racial and ethnic makeup of Mason Elem.?
The largest demographic group at Mason Elem. is White at 42.7% of enrollment, in St Louis, MO. Its student body is more racially and ethnically mixed than most US schools, with a diversity index of 66.7/100.
What is the Resource Investment Index for Mason Elem.?
Mason Elem. 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 Mason Elem. rank among schools in St Louis?
By Resource Investment Index, Mason Elem. ranks #10 of 65 schools in St Louis, MO. This compares federal resource and staffing data among local peers; it is not a test-score or academic ranking. See all schools in St Louis on the city page.
Is Mason Elem. a good school?
Mason Elem. earns 49/100 on the Resource Investment Index, with class sizes larger than 70% of Missouri schools. It is also more racially and ethnically mixed than most Missouri 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 St. Louis City?
Besides Mason Elem., St. Louis City also operates Gateway High (860 students), Roosevelt High (734 students), and Vashon High (621 students). See the St. Louis City 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.