Enrollment
567
Missouri · 2024-25 NCES data
Middle school (grades 6-8) · Arnold, MO
Federal NCES profile for Ridgewood Middle, including enrollment, faculty, free-lunch eligibility, demographics, and resource indicators - Resource Investment Index 37/100.
The verdict
Ridgewood Middle earns 37/100 on the Resource Investment Index, with class sizes near the Missouri median.
Ridgewood Middle has class sizes near the Missouri median. Computed live against every Missouri school reporting to NCES.
By Resource Investment Index, Ridgewood Middle ranks #9 of 10 public schools in Arnold, MO.
Enrollment
567
Missouri · 2024-25 NCES data
Teachers (FTE)
48.0
Federal CCD staff survey
Students per teacher
11.8:1
vs 12.8:1 Missouri avg
-8% vs state
Free-lunch eligible
31.2%
vs 46.1% Missouri avg
-32% vs state
How Ridgewood Middle compares with Missouri and U.S. medians
At or below state median
11.8:1 - 1.0 below the Missouri state median of 12.8:1, indicating smaller average class loads than typical schools in the state.
Ridgewood Middle is a mid-sized middle school in Arnold, Missouri, enrolling 567 students.
Class sizes run a bit leaner than typical: 11.8:1 puts it in the smaller third of Missouri schools by student-teacher ratio.
Economic need runs somewhat below the state's typical profile, with 31.2% of students eligible for free meals.
Enrollment of 567 puts it in the larger third of Missouri schools by headcount.
Its Resource Investment Index lands in the lower third of 2,313 scored Missouri schools.
Among 449 similarly sized, similarly resourced-need Missouri schools statewide, it ranks #412, in the lower tier once campus size and economic need are matched.
Its student body is predominantly White (81% of enrollment) (diversity index 33/100).
Counselor access is stretched at roughly 567 students per counselor, well above the ASCA-recommended 250:1 ceiling.
Chronic absenteeism is elevated: 30.0% of students missed 10% or more of school days (2021-22 Civil Rights Data Collection).
Fox C-6 also operates Seckman Sr. High (1,737 students) and Fox Sr. High (1,660 students) alongside Ridgewood Middle.
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
Ridgewood Middle on the metrics families compare, against Missouri and U.S. means.
| Metric | This school | vs Missouri | Missouri avg | U.S. avg |
|---|---|---|---|---|
| Students per teacher | 11.8:1 | ▼ 8% | 12.8:1 | 15.7:1 |
| Free-lunch eligible | 31.2% | ▼ 32% | 46.1% | 51.7% |
| Enrollment | 567 | top 17% | - | - |
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 81.1% of enrollment.
Simpson diversity index - at 33.3, Ridgewood Middle is more mixed than the Missouri school average of 31.0.
District-wide per-pupil expenditure for Fox C-6, which includes Ridgewood Middle.
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 |
|---|---|---|---|
| Seckman Sr. High | Larger | Lower economic need | Higher S:T ratio |
| Fox Sr. High | Larger | Similar economic need | Higher S:T ratio |
| Seckman Middle | Similar size | Lower economic need | Similar S:T ratio |
| Fox Middle | Similar size | Similar economic need | Similar S:T ratio |
| Antonia Middle School | Similar size | Lower economic need | Similar S:T ratio |
Comparisons are relative to Ridgewood Middle's own figures; each column derives from NCES Common Core of Data.
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.
Next steps
Verify locally before acting on Ridgewood Middle'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.
Ridgewood Middle has 567 students enrolled. It is a middle school in Arnold, MO.
The student-teacher ratio at Ridgewood Middle is 11.8:1, which is 8% 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.
31.2% of students at Ridgewood Middle are eligible for free lunch, compared to the Missouri average of 46.1%.
The largest demographic group at Ridgewood Middle is White at 81.1% of enrollment, in Arnold, MO.
Ridgewood Middle has a Resource Investment Index of 37/100 (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).
By Resource Investment Index, Ridgewood Middle ranks #9 of 10 public schools in Arnold, MO. This compares federal resource and staffing data among local peers; it is not a test-score or academic ranking. See all public schools in Arnold on the city page.
Ridgewood Middle earns 37/100 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.
Besides Ridgewood Middle, Fox C-6 also operates Seckman Sr. High (1,737 students), Fox Sr. High (1,660 students), and Seckman Middle (687 students). See the Fox C-6 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.
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Last updated:
PlainSchools, “Ridgewood Middle, Arnold MO.” 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/ridgewood-middle-mo
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