Compiled from official source data by PlainSchools.
10 public K-12 schools in Arnold from NCES Common Core of Data: enrollment, grade span, demographics, and Civil Rights Data Collection statistics for every active campus.
According to NCES CCD 2024-25, Arnold has more public-school enrollment than 57% of the 4,487 US cities in this directory. Arnold sits in the broad middle of the national city distribution rather than at a single obvious extreme. Its scale, average Resource Investment Index, and staffing position need to be read together: a middle placement on one measure does not cancel a stronger or weaker result on another. The percentile panel makes those dimensions explicit, and the school table shows where the city aggregate breaks into materially different campus profiles.
The school portfolio is elementary-weighted
6 of Arnold's 10 listed schools are elementary campuses. That composition means citywide enrollment and staffing averages are influenced more by early-grade operating patterns than by the city's 2 middle and 1 high-school records. Families comparing later grades should rely on those individual rows rather than the all-school mean.
A small portfolio contains radically different campus scales
Arnold lists only 10 schools, yet reported enrollment runs from 125 to 1,660 students, a 13-fold range. In a portfolio this compact, the smallest record may be a specialized or nonstandard setting rather than a miniature version of the largest campus. That distinction affects how ratios and program fields should be read. Compare similarly configured grade levels first; combining the extremes into one city average conceals more than it explains.
City enrollment
Top 43%
School count
Top 41%
Resource Index average
74th percentile
Teacher staffing
93rd percentile
Fox Sr. High accounts for 32.1% of all Arnold public-school enrollment
That dominant concentration means Arnold-wide averages can mask substantial variation outside the largest entity. Grade level: High. The share measures enrollment concentration only; it does not establish how districts allocate programs, capital, or staff. Enrollment-weighted aggregates give this entity more weight than any smaller peer, while an unweighted entity average treats every record equally.
Arnold school enrollment varies 13× across entities
Arnold school enrollment ranges from 125 students (lowest) to 1,660 students (highest), a spread of 1,535 students. That spread reflects typical urban portfolio variation between specialty programs and large neighbourhood schools. Per-school staffing and program breadth can differ sharply at opposite ends of that enrollment range, so the city average should not be treated as a typical campus.
Arnold operates one school district — a single-district system
Arnold's listed schools share one district boundary, budget authority, and reporting chain. That makes citywide and districtwide governance easier to compare, but it does not make individual campuses uniform: grade configuration, staffing, programs, and student need can still vary materially within the same school district.
Arnold student-teacher ratio is 11.2:1 — low (typically associated with smaller schools or per-school staffing investment that often correlates with stronger per-student supports)
student-teacher ratio is the simplest comparative metric but it does not capture the full picture: the ratio counts FTE classroom teachers against total enrollment, push-in specialists, English-language aides, special-education co-teachers, and counselors are not included in most reporting Lower values often correlate with smaller scale and population characteristics rather than higher resource budgets per se.
Most racially and ethnically mixed schools in Arnold
Ranked by the Simpson student-body diversity index (0-100) from NCES race and ethnicity data, where higher means a more evenly mixed student body. It measures mix, not quality.
Which Arnold school has the highest Resource Investment Index? ▼
Sherwood Elem. has the highest Resource Investment Index among the Arnold schools in this federal-data comparison at 56/100. The index summarizes reported staffing, counseling, gifted-program, and attendance inputs; it is not an academic rating.
How many schools are in Arnold, MO? ▼
Arnold has 10 public schools with a total enrollment of 5,177 students. Average student-teacher ratio: 11.2:1.
Data from NCES Common Core of Data (CCD) 2024-25 and Civil Rights Data Collection (CRDC) 2021-22. The Resource Investment Index uses reported student-teacher ratio,
counselor access, gifted programs, and attendance; it is not an academic rating. Cities must include at least five schools to be listed. This public-data comparison is for informational purposes:
verify current enrollment, attendance boundaries, and programs with the school district before acting. See the guide to understanding NCES data.
