Enrollment
633
California · 2024-25 NCES data
Elementary school (grades K-5) · San Dimas, CA
Arma J. Shull Elementary
Federal NCES profile for Arma J. Shull Elementary, including enrollment, faculty, free-lunch eligibility, demographics, and resource indicators - Resource Investment Index 30/100.
2024-25 NCES dataElementary school (grades K-5)NCES 060561000504
👥 S:T ratio 0
🌟 Gifted program 70
🎓 Counselors 0
📋 Attendance 51
Scored 0–100 from federal NCES and CRDC indicators, resource allocation, not test scores. Full methodology →
The verdict
Arma J. Shull Elementary earns 30/100 on the Resource Investment Index, with class sizes larger than 91% of California schools. It is also more racially and ethnically mixed than most California schools.
- #1 of 4
- elementary schools in San Dimas · Resource Index
- 30
- Resource Index · Lower
- 27.5:1
- large classes for California
- 26.8%
- free-lunch eligible
Arma J. Shull Elementary has class sizes larger than 91% of California schools. Computed live against every California school reporting to NCES.
By Resource Investment Index, Arma J. Shull Elementary ranks #1 of 4 elementary schools in San Dimas, CA.
School address
District: Bonita Unified · California
NCES ID 060561000504 Verify on NCES CCD record →
Teachers (FTE)
23.0
Federal CCD staff survey
Students per teacher
27.5:1
vs 21.5:1 California avg
+28% vs state
Free-lunch eligible
26.8%
vs 55.5% California avg
-52% vs state
Student-teacher ratio in context
How Arma J. Shull Elementary compares with California and U.S. medians
What stands out at Arma J. Shull Elementary
Arma J. Shull Elementary is a mid-sized elementary school in San Dimas, California, enrolling 633 students.
Class loads run heavy: 27.5:1 is larger than about 91% of California schools and 28% above the 21.5:1 state mean, so each teacher carries more students than is typical.
Economic need runs somewhat below the state's typical profile, with 26.8% of students eligible for free meals.
Enrollment of 633 puts it in the larger third of California schools by headcount.
Its Resource Investment Index sits near the middle of the pack among 9,998 scored California schools.
Against 1,388 statewide peers matched on enrollment and economic need, it ranks mid-pack at #839.
Its student body is led by Hispanic or Latino (48%) and Asian (22%), more mixed than most schools in the state (diversity index 67/100).
Counselor access is stretched at roughly 1055 students per counselor, well above the ASCA-recommended 250:1 ceiling.
Attendance runs somewhat below the norm, with 19.6% of students chronically absent per the 2021-22 civil-rights collection.
The surrounding Bonita Unified spends $13,112 per pupil, 21% below the California average, a leaner-resourced district than most.
Among San Dimas's elementary schools, it stands alongside Gladstone Elementary (518 students): Arma J. Shull Elementary is larger than that campus by headcount and runs heavier classes (27.5:1 vs 23.5:1).
Bonita Unified also operates Bonita High (1,911 students) and Ramona Middle (1,371 students) alongside Arma J. Shull Elementary.
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 Arma J. Shull Elementary compares
Arma J. Shull Elementary on the metrics families compare, against California and U.S. means.
| Metric | This school | vs California | California avg | U.S. avg |
|---|---|---|---|---|
| Students per teacher | 27.5:1 | ▲ 28% | 21.5:1 | 15.7:1 |
| Free-lunch eligible | 26.8% | ▼ 52% | 55.5% | 51.7% |
| Enrollment | 633 | top 29% | - | - |
Source: NCES Common Core of Data School-level CCD + state/national means from Public School Universe · 2024-25
27.5:1
Leaner classes than 3% of US schools, heavier class loads than most.
633
Bigger than 75% of US schools by enrollment, mid-sized for the country.
Equity indicators (what these measure)
Economic need
26.8%
free-lunch eligible
- 52% below the California average of 55.5%
Below the 40% Title I threshold; federal aid targets individual qualifying students rather than schoolwide programs.
Staffing depth
27.5:1
students per teacher
- 28% above state mean
Top 91% in California - lower ratio than 9% of state schools
Well above 20:1, one of the more stretched staffing loads nationally relative to enrollment.
Engagement
19.6%
chronically absent (missed 10%+ of school days)
In the 15-20% range, nearing the "high" absenteeism threshold.
Funding equity
$13,112
per pupil, district-wide
- below California avg of $16,509
Well below the U.S. average per-pupil spend, a notably leaner funding position that may affect programs, facilities, and staffing.
Support staff
Counselors0.6 FTE
Student-support staffing from the Civil Rights Data Collection.
Discipline context
14
in-school suspensions + 1 out-of-school
Suspension rate: 2.2 per 100 students. Combined in-school and out-of-school rate: 2.4 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
Hispanic or Latino 48.0%
Asian 22.0%
White 19.0%
Two or More 10.3%
African American 0.8%
Largest group: Hispanic or Latino at 48.0% of enrollment.
Student-body diversity index 67.4/100
Simpson diversity index - at 67.4, Arma J. Shull Elementary is more mixed than the California school average of 46.0.
Programs
Gifted & talented Yes
Funding & spending
District-wide per-pupil expenditure for Bonita Unified, which includes Arma J. Shull Elementary.
$13,112
Per student
-21%
vs California
Avg $16,509
-21%
vs U.S.
Avg $16,593
Revenue mix
Local 34.2%
State 58.4%
Federal 7.4%
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 Arma J. Shull Elementary Compares to District-Mates
| School | Enrollment | Economic Profile | Student-Teacher Ratio |
|---|---|---|---|
| Bonita High | Larger | Similar economic need | Similar S:T ratio |
| Ramona Middle | Larger | Similar economic need | Similar S:T ratio |
| San Dimas High | Larger | Similar economic need | Lower S:T ratio |
| Lone Hill Middle | Larger | Higher economic need | Lower S:T ratio |
| J. Marion Roynon Elementary | Larger | Higher economic need | Lower S:T ratio |
Comparisons are relative to Arma J. Shull Elementary's own figures; each column derives from NCES Common Core of Data.
Other Schools in This District
- Enrollment
- 1,911
- Students per teacher
- 26.2:1
- Resource Index
- 42/100
- Enrollment
- 1,371
- Students per teacher
- 26.9:1
- Resource Index
- 41/100
- Enrollment
- 1,235
- Students per teacher
- 20.6:1
- Resource Index
- 44/100
- Enrollment
- 870
- Students per teacher
- 24.2:1
- Resource Index
- 44/100
- Enrollment
- 842
- Students per teacher
- 24.8:1
- Resource Index
- 28/100
Similar elementary schools in San Dimas
3 comparable elementary schools (grades K-5) serving the same city.
Similar elementary schools statewide
Matched by enrollment size and by staffing ratio across all of California, not just this city - a different peer set than the local comparisons above.
Similar enrollment (~633 students)
Similar student-teacher ratio (~27.5:1)
Next steps
Verify locally before acting on Arma J. Shull Elementary's federal record.
- Compare Arma J. Shull Elementary against another school. Compare schools
- Bonita Unified'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 Arma J. Shull Elementary
How many students attend Arma J. Shull Elementary?
Arma J. Shull Elementary has 633 students enrolled. It is an elementary school in San Dimas, CA.
What is the student-teacher ratio at Arma J. Shull Elementary?
The student-teacher ratio at Arma J. Shull Elementary is 27.5:1, which is 28% higher than the California average of 21.5:1 and 75% higher than the national average of 15.7:1.
What percentage of students receive free lunch at Arma J. Shull Elementary?
26.8% of students at Arma J. Shull Elementary are eligible for free lunch, compared to the California average of 55.5%.
What is the racial and ethnic makeup of Arma J. Shull Elementary?
The largest demographic group at Arma J. Shull Elementary is Hispanic or Latino at 48.0% of enrollment, in San Dimas, CA. Its student body is more racially and ethnically mixed than most US schools, with a diversity index of 67.4/100.
What is the Resource Investment Index for Arma J. Shull Elementary?
Arma J. Shull Elementary has a Resource Investment Index of 30/100 (lower 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 Arma J. Shull Elementary rank among elementary schools in San Dimas?
By Resource Investment Index, Arma J. Shull Elementary ranks #1 of 4 elementary schools in San Dimas, CA. This compares federal resource and staffing data among local peers; it is not a test-score or academic ranking. See all elementary schools in San Dimas on the city page.
Is Arma J. Shull Elementary a good school?
Arma J. Shull Elementary earns 30/100 on the Resource Investment Index, with class sizes larger than 91% of California schools. It is also more racially and ethnically mixed than most California schools. 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 Bonita Unified?
Besides Arma J. Shull Elementary, Bonita Unified also operates Bonita High (1,911 students), Ramona Middle (1,371 students), and San Dimas High (1,235 students). See the Bonita Unified 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.