- Enrollment
- 1,643
- Students per teacher
- 13.6:1
- Resource Index
- 41/100
Elementary school (grades K-5) · O'fallon, MO
Ostmann Elem.
Federal NCES profile for Ostmann Elem., including enrollment, faculty, free-lunch eligibility, demographics, and resource indicators - Resource Investment Index 57/100.
2024-25 NCES dataElementary school (grades K-5)NCES 290837002843
👥 S:T ratio 53
🌟 Gifted program 70
🎓 Counselors 28
📋 Attendance 77
Scored 0–100 from federal NCES and CRDC indicators, resource allocation, not test scores. Full methodology →
The verdict
Ostmann Elem. earns 57/100 on the Resource Investment Index, with class sizes near the Missouri median.
- #1 of 12
- elementary schools in O'fallon · Resource Index
- 57
- Resource Index · Higher
- 11.7:1
- students per teacher
- 5.4%
- free-lunch eligible
Ostmann Elem. has class sizes near the Missouri median. Computed live against every Missouri school reporting to NCES.
By Resource Investment Index, Ostmann Elem. ranks #1 of 12 elementary schools in O'fallon, MO.
School address
District: Ft. Zumwalt R-Ii · Missouri
NCES ID 290837002843 Verify on NCES CCD record →
CCD year-over-year · 2022-23 → 2023-24
+50 students YoY
Ostmann Elem. grew from 349 students in 2022-23 to 399 in 2023-24 (+14.3%).
Teacher FTE added 31.8 → 34.6 across the same CCD years.
Source: NCES Common Core of Data public-school universe (2022-23, 2023-24).
Growing CCD campus
+50 students YoY 290837002843 · O'fallon, MO Elementary · SMALL · TRAD
362 enr · 11.7:1 · 5.4% lunch · RII 57
Nearest enrollment peer: Ft. Zumwalt West High (1,643 students)
Ostmann Elem. grew from 349 students in 2022-23 to 399 in 2023-24 (+14.3%). Teacher FTE added 31.8 → 34.6 across the same CCD years. Read with this school → · District book → · Missouri schools → · Find another →
Ostmann Elem. in the enrollment neighbourhood
Fall enrollment among this campus and nearest district peers
- Ft. Zumwalt We
Ft. Zumwalt West High
1,643 students
- Ft. Zumwalt No
Ft. Zumwalt North High
1,538 students
- Ft. Zumwalt So
Ft. Zumwalt South High
1,212 students
- Ft. Zumwalt Ea
Ft. Zumwalt East High
1,171 students
- Ft. Zuwmalt We
Ft. Zuwmalt West Middle
1,114 students
- This school 362
Ostmann Elem.
362 students
What this shows Ostmann Elem. reports 362 students on the CCD universe file.
How Ostmann Elem. compares
Ostmann Elem. is a growing campus on CCD: ratios and free-lunch share vs Missouri and U.S. means.
| Metric | This school | vs Missouri | Missouri avg | U.S. avg |
|---|---|---|---|---|
| Students per teacher | 11.7:1 | ▼ 9% | 12.8:1 | 15.7:1 |
| Free-lunch eligible | 5.4% | ▼ 88% | 46.1% | 51.7% |
| Enrollment | 362 | top 41% | - | - |
Source: NCES Common Core of Data School-level CCD + state/national means from Public School Universe · 2024-25
11.7:1
Leaner classes than 78% of US schools, among the more generously staffed nationally.
362
Bigger than 42% of US schools by enrollment, mid-sized for the country.
Equity indicators methodology
Economic need
5.4%
free-lunch eligible
- 88% below the Missouri average of 46.1%
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
11.7:1
students per teacher
- 9% below state mean
Top 37% in Missouri - lower ratio than 63% of state schools
Well under the widely cited 15:1 individualized-attention benchmark, among the leaner class loads nationally.
Engagement
9.4%
chronically absent (missed 10%+ of school days)
In the 5-10% range, close to the pre-pandemic national baseline.
Funding equity
$13,648
per pupil, district-wide
- below Missouri avg of $14,087
Well below the U.S. average per-pupil spend, a notably leaner funding position that may affect programs, facilities, and staffing.
Support staff
Counselors1.0 FTE
Per 362 students, the combined health-and-guidance staffing load for this school.
Discipline context
0
in-school suspensions + 0 out-of-school
Suspension rate: 0.0 per 100 students. Combined in-school and out-of-school rate: 0.0 per 100 students. Reported via the Civil Rights Data Collection.
Student demographics
White 80.1%
Asian 8.3%
African American 3.9%
Hispanic or Latino 3.6%
Two or More 3.3%
American Indian / Alaska Native 0.6%
Native Hawaiian / Pacific Islander 0.3%
Largest group: White at 80.1% of enrollment.
Student-body diversity index 34.8/100
Simpson diversity index - at 34.8, Ostmann Elem. is more mixed than the Missouri school average of 31.0.
Programs
Gifted & talented Yes
District finance for Ft. Zumwalt R-Ii reports $13,648 per pupil (NCES F-33) - open the district page for the full revenue mix.
How Ostmann Elem. Compares to District-Mates
| School | Enrollment | Economic Profile | Student-Teacher Ratio |
|---|---|---|---|
| Ft. Zumwalt West High | Larger | Similar economic need | Higher S:T ratio |
| Ft. Zumwalt North High | Larger | Similar economic need | Higher S:T ratio |
| Ft. Zumwalt South High | Larger | Similar economic need | Similar S:T ratio |
| Ft. Zumwalt East High | Larger | Higher economic need | Higher S:T ratio |
| Ft. Zuwmalt West Middle | Larger | Higher economic need | Similar S:T ratio |
Comparisons are relative to Ostmann Elem.'s own figures; each column derives from NCES Common Core of Data.
Other Schools in This District
- Enrollment
- 1,538
- Students per teacher
- 14.1:1
- Resource Index
- 35/100
- Enrollment
- 1,212
- Students per teacher
- 12.9:1
- Resource Index
- 42/100
- Enrollment
- 1,171
- Students per teacher
- 13.2:1
- Resource Index
- 38/100
- Enrollment
- 1,114
- Students per teacher
- 12:1
- Resource Index
- 52/100
Nationwide elementary schools with similar size or staffing
Out-of-state peers matched by enrollment and by student-teacher ratio, not the same-city or same-district lists above.
Similar enrollment (~362 students)
Frequently asked questions about Ostmann Elem.
How many students attend Ostmann Elem.?
Ostmann Elem. has 362 students enrolled. It is an elementary school in O'fallon, MO. CCD year-over-year: 349 (2022-23) → 399 (2023-24), up 50.
What is the student-teacher ratio at Ostmann Elem.?
The student-teacher ratio at Ostmann Elem. is 11.7:1, which is 9% lower than the Missouri average of 12.8:1 and 25% 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 Ostmann Elem.?
5.4% of students at Ostmann Elem. are eligible for free lunch, compared to the Missouri average of 46.1%.
What is the racial and ethnic makeup of Ostmann Elem.?
The largest demographic group at Ostmann Elem. is White at 80.1% of enrollment, in O'fallon, MO.
What is the Resource Investment Index for Ostmann Elem.?
Ostmann Elem. has a Resource Investment Index of 57/100 (higher reported resources relative to schools nationally) based on 4 factors: student-teacher ratio, gifted-program reporting, counselor availability, chronic absenteeism. Not a test-score or academic measure (national median ~41/100, see methodology).
How does Ostmann Elem. rank among elementary schools in O'fallon?
By Resource Investment Index, Ostmann Elem. ranks #1 of 12 elementary schools in O'fallon, MO. This compares federal resource and staffing data among local peers; it is not a test-score or academic ranking. See all elementary schools in O'fallon on the city page.
What other schools are in Ft. Zumwalt R-Ii?
Besides Ostmann Elem., Ft. Zumwalt R-Ii also operates Ft. Zumwalt West High (1,643 students), Ft. Zumwalt North High (1,538 students), and Ft. Zumwalt South High (1,212 students). See the Ft. Zumwalt R-Ii district page for the complete list.