- Enrollment
- 1,643
- Students per teacher
- 13.6:1
- Resource Index
- 41/100
Elementary school (grades K-5) · O'fallon, MO
Twin Chimneys Elem.
Federal NCES profile for Twin Chimneys Elem., including enrollment, faculty, free-lunch eligibility, demographics, and resource indicators - Resource Investment Index 48/100.
2024-25 NCES dataElementary school (grades K-5)NCES 290837000619
👥 S:T ratio 54
🌟 Gifted program 70
🎓 Counselors 2
📋 Attendance 68
Scored 0–100 from federal NCES and CRDC indicators, resource allocation, not test scores. Full methodology →
The verdict
Twin Chimneys Elem. earns 48/100 on the Resource Investment Index, with class sizes near the Missouri median.
- #7 of 12
- elementary schools in O'fallon · Resource Index
- 48
- Resource Index · Typical
- 11.6:1
- students per teacher
- 5.6%
- free-lunch eligible
Twin Chimneys Elem. has class sizes near the Missouri median. Computed live against every Missouri school reporting to NCES.
By Resource Investment Index, Twin Chimneys Elem. ranks #7 of 12 elementary schools in O'fallon, MO.
School address
District: Ft. Zumwalt R-Ii · Missouri
NCES ID 290837000619 Verify on NCES CCD record →
CCD year-over-year · 2022-23 → 2023-24
-27 students YoY
Twin Chimneys Elem. shrank from 537 students in 2022-23 to 510 in 2023-24 (-5.0%).
Teacher FTE lost 42.2 → 40.5 across the same CCD years.
Source: NCES Common Core of Data public-school universe (2022-23, 2023-24).
Shrinking CCD campus
-27 students YoY 290837000619 · O'fallon, MO Elementary · SMALL · TRAD
488 enr · 11.6:1 · 5.6% lunch · RII 48
Nearest enrollment peer: Ft. Zumwalt West High (1,643 students)
Twin Chimneys Elem. shrank from 537 students in 2022-23 to 510 in 2023-24 (-5.0%). Teacher FTE lost 42.2 → 40.5 across the same CCD years. Read with this school → · District book → · Missouri schools → · Find another →
Twin Chimneys 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 488
Twin Chimneys Elem.
488 students
What this shows Twin Chimneys Elem. reports 488 students on the CCD universe file.
How Twin Chimneys Elem. compares
Twin Chimneys Elem. is a shrinking 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 | 11.6:1 | ▼ 9% | 12.8:1 | 15.7:1 |
| Free-lunch eligible | 5.6% | ▼ 88% | 46.1% | 51.7% |
| Enrollment | 488 | top 23% | - | - |
Source: NCES Common Core of Data School-level CCD + state/national means from Public School Universe · 2024-25
11.6:1
Leaner classes than 79% of US schools, among the more generously staffed nationally.
488
Bigger than 60% of US schools by enrollment, mid-sized for the country.
Equity indicators methodology
Economic need
5.6%
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
11.6:1
students per teacher
- 9% below state mean
Top 36% in Missouri - lower ratio than 64% of state schools
Well under the widely cited 15:1 individualized-attention benchmark, among the leaner class loads nationally.
Engagement
12.9%
chronically absent (missed 10%+ of school days)
In the 10-15% range, above the pre-pandemic national baseline but within the broader post-pandemic picture.
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 488 students, the combined health-and-guidance staffing load for this school.
Discipline context
5
in-school suspensions + 5 out-of-school
Suspension rate: 1.0 per 100 students. Combined in-school and out-of-school rate: 2.0 per 100 students. Reported via the Civil Rights Data Collection.
Student demographics
White 68.2%
Asian 15.2%
Two or More 7.6%
African American 5.3%
Hispanic or Latino 3.3%
American Indian / Alaska Native 0.4%
Largest group: White at 68.2% of enrollment.
Student-body diversity index 50.2/100
Simpson diversity index - at 50.2, Twin Chimneys 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 Twin Chimneys 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 Twin Chimneys 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 (~488 students)
Frequently asked questions about Twin Chimneys Elem.
How many students attend Twin Chimneys Elem.?
Twin Chimneys Elem. has 488 students enrolled. It is an elementary school in O'fallon, MO. CCD year-over-year: 537 (2022-23) → 510 (2023-24), down 27.
What is the student-teacher ratio at Twin Chimneys Elem.?
The student-teacher ratio at Twin Chimneys Elem. is 11.6:1, which is 9% lower than the Missouri average of 12.8:1 and 26% 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 Twin Chimneys Elem.?
5.6% of students at Twin Chimneys Elem. are eligible for free lunch, compared to the Missouri average of 46.1%.
What is the racial and ethnic makeup of Twin Chimneys Elem.?
The largest demographic group at Twin Chimneys Elem. is White at 68.2% of enrollment, in O'fallon, MO. Its student body is more racially and ethnically mixed than most US schools, with a diversity index of 50.2/100.
What is the Resource Investment Index for Twin Chimneys Elem.?
Twin Chimneys Elem. has a Resource Investment Index of 48/100 (typical 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 Twin Chimneys Elem. rank among elementary schools in O'fallon?
By Resource Investment Index, Twin Chimneys Elem. ranks #7 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 Twin Chimneys 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.