Enrollment
488
Missouri · 2024-25 NCES data
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 →
Teachers (FTE)
42.0
Federal CCD staff survey
Students per teacher
11.6:1
vs 12.8:1 Missouri avg
-9% vs state
Free-lunch eligible
5.6%
vs 46.1% Missouri avg
-88% vs state
Student-teacher ratio in context
How Twin Chimneys Elem. compares with Missouri and U.S. medians
What stands out at Twin Chimneys Elem.
Twin Chimneys Elem. is a lower-poverty, mid-sized elementary school in O'fallon, Missouri, enrolling 488 students.
Class sizes run a bit leaner than typical: 11.6:1 puts it in the smaller third of Missouri schools by student-teacher ratio.
Comparatively few students face economic hardship here, 5.6% free-meal eligibility runs 88% below the Missouri average.
Enrollment of 488 puts it in the larger third of Missouri schools by headcount.
Its Resource Investment Index sits near the middle of the pack among 2,313 scored Missouri schools.
Against 188 statewide peers matched on enrollment and economic need, it ranks mid-pack at #131.
Its student body is led by White (68%) and Asian (15%) (diversity index 50/100).
Counselor access is stretched at roughly 488 students per counselor, well above the ASCA-recommended 250:1 ceiling.
12.9% of students were chronically absent in the 2021-22 collection, in line with the post-pandemic national range.
Ft. Zumwalt R-Ii also operates Ft. Zumwalt West High (1,643 students) and Ft. Zumwalt North High (1,538 students) alongside Twin Chimneys 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 Twin Chimneys Elem. compares
Twin Chimneys 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 | 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 (what these measure)
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
$12,920
per pupil, district-wide
- below Missouri avg of $12,931
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.
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 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
Funding & spending
District-wide per-pupil expenditure for Ft. Zumwalt R-Ii, which includes Twin Chimneys Elem..
$12,920
Per student
0%
vs Missouri
Avg $12,931
-22%
vs U.S.
Avg $16,593
Revenue mix
Local 65.1%
State 26.3%
Federal 8.6%
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 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
- 1,643
- Students per teacher
- 13.6:1
- Resource Index
- 41/100
- 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
Similar elementary 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 (~488 students)
Similar student-teacher ratio (~11.6:1)
Next steps
Verify locally before acting on Twin Chimneys Elem.'s federal record.
- Compare Twin Chimneys Elem. against another school. Compare schools
- Ft. Zumwalt R-Ii'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 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.
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, counselor availability, attendance rates. 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.
Is Twin Chimneys Elem. a good school?
Twin Chimneys Elem. earns 48/100 on the Resource Investment Index, with class sizes near the Missouri 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.
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.
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.