- Enrollment
- 1,843
- Students per teacher
- 20:1
- Resource Index
- 49/100
Elementary school (grades K-5) · St Charles, MO
Castlio Elem.
Federal NCES profile for Castlio Elem., including enrollment, faculty, free-lunch eligibility, demographics, and resource indicators - Resource Investment Index 62/100.
2024-25 NCES dataElementary school (grades K-5)NCES 292895001856
👥 S:T ratio 45
🌟 Gifted program 70
🎓 Counselors 52
📋 Attendance 82
Scored 0–100 from federal NCES and CRDC indicators, resource allocation, not test scores. Full methodology →
The verdict
Castlio Elem. earns 62/100 on the Resource Investment Index, with class sizes near the Missouri median.
- #3 of 9
- elementary schools in St Charles · Resource Index
- 62
- Resource Index · Higher
- 13.7:1
- students per teacher
- 8.9%
- free-lunch eligible
Castlio Elem. has class sizes near the Missouri median. Computed live against every Missouri school reporting to NCES.
By Resource Investment Index, Castlio Elem. ranks #3 of 9 elementary schools in St Charles, MO.
School address
District: Francis Howell R-Iii · Missouri
NCES ID 292895001856 Verify on NCES CCD record →
CCD year-over-year · 2022-23 → 2023-24
+20 students YoY
Castlio Elem. held near 838 students from 2022-23 to 2023-24 (+20 headcount).
Teacher FTE added 62.0 → 65.0 across the same CCD years.
Source: NCES Common Core of Data public-school universe (2022-23, 2023-24).
Steady CCD campus
+20 students YoY 292895001856 · St Charles, MO Elementary · MID · TRAD
847 enr · 13.7:1 · 8.9% lunch · RII 62
Nearest enrollment peer: Francis Howell High (1,843 students)
Castlio Elem. held near 838 students from 2022-23 to 2023-24 (+20 headcount). Teacher FTE added 62.0 → 65.0 across the same CCD years. Read with this school → · District book → · Missouri schools → · Find another →
Castlio Elem. in the enrollment neighbourhood
Fall enrollment among this campus and nearest district peers
- Francis Howell
Francis Howell High
1,843 students
- Francis Howell
Francis Howell Central High
1,750 students
- Francis Howell
Francis Howell North High
1,716 students
- Fairmount Elem
Fairmount Elem.
971 students
- Central Elem.
Central Elem.
865 students
- This school
Castlio Elem.
847 students
What this shows Castlio Elem. reports 847 students on the CCD universe file.
How Castlio Elem. compares
Castlio Elem. held steady on CCD headcount: ratios and free-lunch share vs Missouri and U.S. means.
| Metric | This school | vs Missouri | Missouri avg | U.S. avg |
|---|---|---|---|---|
| Students per teacher | 13.7:1 | ▲ 7% | 12.8:1 | 15.7:1 |
| Free-lunch eligible | 8.9% | ▼ 81% | 46.1% | 51.7% |
| Enrollment | 847 | top 7% | - | - |
Source: NCES Common Core of Data School-level CCD + state/national means from Public School Universe · 2024-25
13.7:1
Leaner classes than 60% of US schools, a middle-of-the-pack class size.
847
Bigger than 87% of US schools by enrollment, a large campus nationally.
Equity indicators methodology
Economic need
8.9%
free-lunch eligible
- 81% 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
13.7:1
students per teacher
- 7% above state mean
Top 65% in Missouri - lower ratio than 35% of state schools
Close to the 15:1 benchmark most often cited for individualized attention.
Engagement
7.4%
chronically absent (missed 10%+ of school days)
In the 5-10% range, close to the pre-pandemic national baseline.
Funding equity
$12,462
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
Counselors3.5 FTE
Per 242 students, the combined health-and-guidance staffing load for this school.
Discipline context
4
in-school suspensions + 7 out-of-school
Suspension rate: 0.5 per 100 students. Combined in-school and out-of-school rate: 1.3 per 100 students. Reported via the Civil Rights Data Collection.
Student demographics
White 73.8%
Asian 7.7%
Hispanic or Latino 6.4%
Two or More 6.4%
African American 5.4%
American Indian / Alaska Native 0.4%
Largest group: White at 73.8% of enrollment.
Student-body diversity index 43.8/100
Simpson diversity index - at 43.8, Castlio Elem. is more mixed than the Missouri school average of 31.0.
Programs
Gifted & talented Yes
District finance for Francis Howell R-Iii reports $12,462 per pupil (NCES F-33) - open the district page for the full revenue mix.
How Castlio Elem. Compares to District-Mates
| School | Enrollment | Economic Profile | Student-Teacher Ratio |
|---|---|---|---|
| Francis Howell High | Larger | Similar economic need | Higher S:T ratio |
| Francis Howell Central High | Larger | Similar economic need | Higher S:T ratio |
| Francis Howell North High | Larger | Similar economic need | Higher S:T ratio |
| Fairmount Elem. | Similar size | Similar economic need | Similar S:T ratio |
| Central Elem. | Similar size | Higher economic need | Similar S:T ratio |
Comparisons are relative to Castlio Elem.'s own figures; each column derives from NCES Common Core of Data.
Other Schools in This District
- Enrollment
- 1,750
- Students per teacher
- 18.8:1
- Resource Index
- 51/100
- Enrollment
- 1,716
- Students per teacher
- 19.1:1
- Resource Index
- 48/100
- Enrollment
- 971
- Students per teacher
- 12.4:1
- Resource Index
- 63/100
- Enrollment
- 865
- Students per teacher
- 14:1
- Resource Index
- 63/100
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 (~847 students)
Frequently asked questions about Castlio Elem.
How many students attend Castlio Elem.?
Castlio Elem. has 847 students enrolled. It is an elementary school in St Charles, MO. CCD year-over-year: 818 (2022-23) → 838 (2023-24), nearly flat (+20).
What is the student-teacher ratio at Castlio Elem.?
The student-teacher ratio at Castlio Elem. is 13.7:1, which is 7% higher than the Missouri average of 12.8:1 and 13% lower than the national average of 15.7:1.
What percentage of students receive free lunch at Castlio Elem.?
8.9% of students at Castlio Elem. are eligible for free lunch, compared to the Missouri average of 46.1%.
What is the racial and ethnic makeup of Castlio Elem.?
The largest demographic group at Castlio Elem. is White at 73.8% of enrollment, in St Charles, MO.
What is the Resource Investment Index for Castlio Elem.?
Castlio Elem. has a Resource Investment Index of 62/100 (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 Castlio Elem. rank among elementary schools in St Charles?
By Resource Investment Index, Castlio Elem. ranks #3 of 9 elementary schools in St Charles, 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 St Charles on the city page.
What other schools are in Francis Howell R-Iii?
Besides Castlio Elem., Francis Howell R-Iii also operates Francis Howell High (1,843 students), Francis Howell Central High (1,750 students), and Francis Howell North High (1,716 students). See the Francis Howell R-Iii district page for the complete list.