Enrollment
327
Oklahoma · 2024-25 NCES data
Elementary school (grades K-5) · Duncan, OK
Federal NCES profile for Horace Mann Es, including enrollment, faculty, free-lunch eligibility, demographics, and resource indicators - Resource Investment Index 57/100.
The verdict
Horace Mann Es earns 57/100 on the Resource Investment Index, with class sizes near the Oklahoma median.
Horace Mann Es has class sizes near the Oklahoma median. Computed live against every Oklahoma school reporting to NCES.
By Resource Investment Index, Horace Mann Es ranks #2 of 5 elementary schools in Duncan, OK.
Enrollment
327
Oklahoma · 2024-25 NCES data
Teachers (FTE)
21.0
Federal CCD staff survey
Students per teacher
15.6:1
vs 16.1:1 Oklahoma avg
-3% vs state
How Horace Mann Es compares with Oklahoma and U.S. medians
At or below state median
15.6:1 - 0.5 below the Oklahoma state median of 16.1:1, indicating smaller average class loads than typical schools in the state.
Horace Mann Es is a mid-sized elementary school in Duncan, Oklahoma, enrolling 327 students.
At 15.6:1, its student-teacher ratio sits close to the Oklahoma median, within a few percentage points of the 16.1:1 state norm, neither notably crowded nor notably small.
With 327 students, its enrollment sits close to the Oklahoma median campus size.
Its Resource Investment Index lands in the upper third of 1,778 scored Oklahoma schools.
Its student body is led by White (52%) and Hispanic or Latino (22%) (diversity index 65/100).
Counselor availability sits well past the ASCA benchmark, roughly 327 students sharing each counselor, though short of the most stretched campuses.
Attendance holds up well here: only 4.9% of students were chronically absent, below the typical post-pandemic national figure.
Its district draws 19.9% of revenue from federal sources, an above-typical federal share that tends to track a higher-need student population.
Among Duncan's elementary schools, it stands alongside Emerson Es (336 students): Horace Mann Es is smaller than that campus by headcount and runs heavier classes (15.6:1 vs 14.6:1).
Duncan also operates Duncan Hs (981 students) and Duncan Ms (696 students) alongside Horace Mann Es.
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
Horace Mann Es on the metrics families compare, against Oklahoma and U.S. means.
| Metric | This school | vs Oklahoma | Oklahoma avg | U.S. avg |
|---|---|---|---|---|
| Students per teacher | 15.6:1 | ▼ 3% | 16.1:1 | 15.7:1 |
| Enrollment | 327 | top 45% | - | - |
Source: NCES Common Core of Data School-level CCD + state/national means from Public School Universe · 2024-25
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.
Largest group: White at 52.3% of enrollment.
Simpson diversity index - at 65.1, Horace Mann Es is more mixed than the Oklahoma school average of 59.6.
District-wide per-pupil expenditure for Duncan, which includes Horace Mann Es.
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.
| School | Enrollment | Economic Profile | Student-Teacher Ratio |
|---|---|---|---|
| Duncan Hs | Larger | No free-lunch data | Higher S:T ratio |
| Duncan Ms | Larger | No free-lunch data | Similar S:T ratio |
| Emerson Es | Similar size | No free-lunch data | Similar S:T ratio |
| Woodrow Wilson Es | Similar size | No free-lunch data | Higher S:T ratio |
| Plato Es | Similar size | No free-lunch data | Higher S:T ratio |
Comparisons are relative to Horace Mann Es's own figures; each column derives from NCES Common Core of Data.
4 comparable elementary schools (grades K-5) serving the same city.
Matched by enrollment size and by staffing ratio across all of Oklahoma, not just this city - a different peer set than the local comparisons above.
Next steps
Verify locally before acting on Horace Mann Es's federal record.
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.
Horace Mann Es has 327 students enrolled. It is an elementary school in Duncan, OK.
The student-teacher ratio at Horace Mann Es is 15.6:1, which is 3% lower than the Oklahoma average of 16.1:1 and 1% lower than the national average of 15.7:1. Lower ratios generally mean more individual attention per student.
The largest demographic group at Horace Mann Es is White at 52.3% of enrollment, in Duncan, OK. Its student body is more racially and ethnically mixed than most US schools, with a diversity index of 65.1/100.
Horace Mann Es has a Resource Investment Index of 57/100 (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).
By Resource Investment Index, Horace Mann Es ranks #2 of 5 elementary schools in Duncan, OK. This compares federal resource and staffing data among local peers; it is not a test-score or academic ranking. See all elementary schools in Duncan on the city page.
Horace Mann Es earns 57/100 on the Resource Investment Index, with class sizes near the Oklahoma median. 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.
Besides Horace Mann Es, Duncan also operates Duncan Hs (981 students), Duncan Ms (696 students), and Emerson Es (336 students). See the Duncan district page for the complete list.
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.
Published by
PlainSchools Editorial
Independent public-data reference that compiles, verifies, and contextualizes official datasets. We do not accept compensation from entities we cover, and every dataset cites its originating public source.
Last updated:
PlainSchools, “Horace Mann Es, Duncan OK.” Compiled from NCES Common Core of Data, Civil Rights Data Collection, and the NCES F-33 finance survey; data as of June 2026. https://plainschools.com/schools/horace-mann-es-ok
You are welcome to quote these figures with attribution to PlainSchools and the underlying source. The URL above is stable.