Enrollment
537
California · 2024-25 NCES data
Elementary school (grades K-5) · Rialto, CA
W.J.C. Trapp Elementary
Federal NCES profile for W.J.C. Trapp Elementary, including enrollment, faculty, free-lunch eligibility, demographics, and resource indicators - Resource Investment Index 38/100.
2024-25 NCES dataElementary school (grades K-5)NCES 063237004999
👥 S:T ratio 0
🌟 Gifted program 70
📋 Attendance 43
Scored 0–100 from federal NCES and CRDC indicators, resource allocation, not test scores. Full methodology →
The verdict
W.J.C. Trapp Elementary earns 38/100 on the Resource Investment Index, with class sizes larger than 83% of California schools.
- #2 of 16
- elementary schools in Rialto · Resource Index
- 38
- Resource Index · Typical
- 25.6:1
- large classes for California
- 61.5%
- free-lunch eligible
W.J.C. Trapp Elementary has class sizes larger than 83% of California schools. Computed live against every California school reporting to NCES.
By Resource Investment Index, W.J.C. Trapp Elementary ranks #2 of 16 elementary schools in Rialto, CA.
School address
District: Rialto Unified · California
NCES ID 063237004999 Verify on NCES CCD record →
Teachers (FTE)
21.0
Federal CCD staff survey
Students per teacher
25.6:1
vs 21.5:1 California avg
+19% vs state
Free-lunch eligible
61.5%
vs 55.5% California avg
+11% vs state
Student-teacher ratio in context
How W.J.C. Trapp Elementary compares with California and U.S. medians
What stands out at W.J.C. Trapp Elementary
W.J.C. Trapp Elementary is a higher-need, mid-sized elementary school in Rialto, California, enrolling 537 students.
Class loads run somewhat heavier than typical: 25.6:1 puts it in the larger third of California schools by student-teacher ratio.
Its free-meal eligibility rate of 61.5% lands close to the California typical range, neither a high- nor low-need campus by this measure.
With 537 students, its enrollment sits close to the California median campus size.
Its Resource Investment Index lands in the upper third of 9,998 scored California schools.
Among 1,938 similarly sized, similarly resourced-need California schools statewide, it ranks #203, a top-tier result once campus size and economic need are matched.
Its student body is predominantly Hispanic or Latino (86% of enrollment) (diversity index 25/100).
Attendance runs somewhat below the norm, with 22.7% of students chronically absent per the 2021-22 civil-rights collection.
Among Rialto's elementary schools, it stands alongside Charlotte N. Werner Elementary (739 students): W.J.C. Trapp Elementary is smaller than that campus by headcount and runs heavier classes (25.6:1 vs 23.8:1).
Rialto Unified also operates Rialto High (2,623 students) and Eisenhower High (2,075 students) alongside W.J.C. Trapp 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 W.J.C. Trapp Elementary compares
W.J.C. Trapp 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 | 25.6:1 | ▲ 19% | 21.5:1 | 15.7:1 |
| Free-lunch eligible | 61.5% | ▲ 11% | 55.5% | 51.7% |
| Enrollment | 537 | top 40% | - | - |
Source: NCES Common Core of Data School-level CCD + state/national means from Public School Universe · 2024-25
25.6:1
Leaner classes than 4% of US schools, heavier class loads than most.
537
Bigger than 66% of US schools by enrollment, mid-sized for the country.
Equity indicators (what these measure)
Economic need
61.5%
free-lunch eligible
- 11% above the California average of 55.5%
Above the 40% Title I schoolwide threshold; federal funds support the whole school, not individual students.
Staffing depth
25.6:1
students per teacher
- 19% above state mean
Top 83% in California - lower ratio than 17% of state schools
Well above 20:1, one of the more stretched staffing loads nationally relative to enrollment.
Engagement
22.7%
chronically absent (missed 10%+ of school days)
At or above 20%, the commonly used threshold for "high" chronic absenteeism, signaling significant barriers to regular attendance.
Funding equity
$15,995
per pupil, district-wide
- below California avg of $16,509
Close to the U.S. public-school average per-pupil spend.
Support staff
Counselors0.0 FTE
Student-support staffing from the Civil Rights Data Collection.
Discipline context
3
in-school suspensions + 9 out-of-school
Suspension rate: 0.6 per 100 students. Combined in-school and out-of-school rate: 2.2 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 86.4%
African American 6.3%
White 4.7%
Two or More 1.5%
Asian 1.1%
Largest group: Hispanic or Latino at 86.4% of enrollment.
Student-body diversity index 24.7/100
Simpson diversity index - at 24.7, W.J.C. Trapp Elementary is less mixed than the California school average of 46.0.
Programs
Gifted & talented Yes
Funding & spending
District-wide per-pupil expenditure for Rialto Unified, which includes W.J.C. Trapp Elementary.
$15,995
Per student
-3%
vs California
Avg $16,509
-4%
vs U.S.
Avg $16,593
Revenue mix
Local 16.4%
State 72.8%
Federal 10.9%
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 W.J.C. Trapp Elementary Compares to District-Mates
| School | Enrollment | Economic Profile | Student-Teacher Ratio |
|---|---|---|---|
| Rialto High | Larger | Similar economic need | Lower S:T ratio |
| Eisenhower High | Larger | Higher economic need | Lower S:T ratio |
| Wilmer Amina Carter High | Larger | Similar economic need | Lower S:T ratio |
| William G. Jehue Middle | Larger | Similar economic need | Similar S:T ratio |
| Rialto Middle | Larger | Higher economic need | Lower S:T ratio |
Comparisons are relative to W.J.C. Trapp Elementary's own figures; each column derives from NCES Common Core of Data.
Other Schools in This District
- Enrollment
- 2,623
- Students per teacher
- 22.2:1
- Resource Index
- 39/100
- Enrollment
- 2,075
- Students per teacher
- 20.8:1
- Resource Index
- 32/100
- Enrollment
- 1,951
- Students per teacher
- 21:1
- Resource Index
- 33/100
- Enrollment
- 1,444
- Students per teacher
- 25.8:1
- Resource Index
- 23/100
- Enrollment
- 1,017
- Students per teacher
- 23.1:1
- Resource Index
- 27/100
Similar elementary schools in Rialto
6 comparable elementary schools (grades K-5) serving the same city.
Charlotte N. Werner Elementary
Standard public school
739 students 23.8:1 students per teacher
Sam V. Curtis Elementary
Standard public school
702 students 26:1 students per teacher
J.P. Kelley Elementary
Standard public school
661 students 24.5:1 students per teacher
Samuel W. Simpson Elementary
Standard public school
638 students 23.6:1 students per teacher
George H. Dunn Elementary
Standard public school
609 students 24.4:1 students per teacher
Helen L. Dollahan Elementary
Standard public school
608 students 24.3:1 students per teacher
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 (~537 students)
Similar student-teacher ratio (~25.6:1)
Next steps
Verify locally before acting on W.J.C. Trapp Elementary's federal record.
- Compare W.J.C. Trapp Elementary against another school. Compare schools
- Rialto 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 W.J.C. Trapp Elementary
How many students attend W.J.C. Trapp Elementary?
W.J.C. Trapp Elementary has 537 students enrolled. It is an elementary school in Rialto, CA.
What is the student-teacher ratio at W.J.C. Trapp Elementary?
The student-teacher ratio at W.J.C. Trapp Elementary is 25.6:1, which is 19% higher than the California average of 21.5:1 and 63% higher than the national average of 15.7:1.
What percentage of students receive free lunch at W.J.C. Trapp Elementary?
61.5% of students at W.J.C. Trapp Elementary are eligible for free lunch, compared to the California average of 55.5%.
What is the racial and ethnic makeup of W.J.C. Trapp Elementary?
The largest demographic group at W.J.C. Trapp Elementary is Hispanic or Latino at 86.4% of enrollment, in Rialto, CA.
What is the Resource Investment Index for W.J.C. Trapp Elementary?
W.J.C. Trapp Elementary has a Resource Investment Index of 38/100 (typical reported resources relative to schools nationally) based on 3 factors: student-teacher ratio, attendance rates. Not a test-score or academic measure (national median ~41/100, see methodology).
How does W.J.C. Trapp Elementary rank among elementary schools in Rialto?
By Resource Investment Index, W.J.C. Trapp Elementary ranks #2 of 16 elementary schools in Rialto, 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 Rialto on the city page.
Is W.J.C. Trapp Elementary a good school?
W.J.C. Trapp Elementary earns 38/100 on the Resource Investment Index, with class sizes larger than 83% of 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 Rialto Unified?
Besides W.J.C. Trapp Elementary, Rialto Unified also operates Rialto High (2,623 students), Eisenhower High (2,075 students), and Wilmer Amina Carter High (1,951 students). See the Rialto 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.