- Enrollment
- 736
- Students per teacher
- 26.3:1
- Resource Index
- 48/100
Elementary school (grades K-5) · Ontario, CA
Arroyo Elementary
Federal NCES profile for Arroyo Elementary, including enrollment, faculty, free-lunch eligibility, demographics, and resource indicators - Resource Investment Index 28/100.
2024-25 NCES dataElementary school (grades K-5)NCES 062847004387
👥 S:T ratio 6
🌟 Gifted program 70
🎓 Counselors 1
📋 Attendance 34
Scored 0–100 from federal NCES and CRDC indicators, resource allocation, not test scores. Full methodology →
The verdict
Arroyo Elementary earns 28/100 on the Resource Investment Index, with class sizes near the California median. It is also less racially and ethnically mixed than most California schools.
- #12 of 26
- elementary schools in Ontario · Resource Index
- 28
- Resource Index · Lower
- 23.5:1
- students per teacher
- 67.0%
- free-lunch eligible
Arroyo Elementary has class sizes near the California median. Computed live against every California school reporting to NCES.
By Resource Investment Index, Arroyo Elementary ranks #12 of 26 elementary schools in Ontario, CA.
School address
District: Ontario-Montclair · California
NCES ID 062847004387 Verify on NCES CCD record →
CCD year-over-year · 2022-23 → 2023-24
+32 students YoY
Arroyo Elementary grew from 467 students in 2022-23 to 499 in 2023-24 (+6.9%).
Teacher FTE added 21.9 → 23.7 across the same CCD years.
Source: NCES Common Core of Data public-school universe (2022-23, 2023-24).
Growing CCD campus
+32 students YoY 062847004387 · Ontario, CA Elementary · SMALL · TRAD
493 enr · 23.5:1 · 67.0% lunch · RII 28
Nearest enrollment peer: Edison Elementary (736 students)
Arroyo Elementary grew from 467 students in 2022-23 to 499 in 2023-24 (+6.9%). Teacher FTE added 21.9 → 23.7 across the same CCD years. Read with this school → · District book → · California schools → · Find another →
Arroyo Elementary in the enrollment neighbourhood
Fall enrollment among this campus and nearest district peers
- Edison Element
Edison Elementary
736 students
- Central Langua
Central Language Academy
736 students
- Ray Wiltsey Mi
Ray Wiltsey Middle
727 students
- Oaks Middle
Oaks Middle
668 students
- Serrano Middle
Serrano Middle
657 students
- This school
Arroyo Elementary
493 students
What this shows Arroyo Elementary reports 493 students on the CCD universe file.
How Arroyo Elementary compares
Arroyo Elementary is a growing campus on CCD: ratios and free-lunch share vs California and U.S. means.
| Metric | This school | vs California | California avg | U.S. avg |
|---|---|---|---|---|
| Students per teacher | 23.5:1 | ▲ 9% | 21.5:1 | 15.7:1 |
| Free-lunch eligible | 67.0% | ▲ 21% | 55.5% | 51.7% |
| Enrollment | 493 | top 46% | - | - |
Source: NCES Common Core of Data School-level CCD + state/national means from Public School Universe · 2024-25
23.5:1
Leaner classes than 7% of US schools, heavier class loads than most.
493
Bigger than 61% of US schools by enrollment, mid-sized for the country.
Equity indicators methodology
Economic need
67.0%
free-lunch eligible
- 21% 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
23.5:1
students per teacher
- 9% above state mean
Top 67% in California - lower ratio than 33% of state schools
Above 20:1, running heavier than the typical U.S. public school; staffing is comparatively stretched.
Engagement
26.6%
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
$21,832
per pupil, district-wide
- above California avg of $18,665
Well above the U.S. public-school average, reflecting substantially higher local or state investment per enrolled student.
Support staff
Counselors1.0 FTE
Per 493 students, the combined health-and-guidance staffing load for this school.
Discipline context
0
in-school suspensions + 4 out-of-school
Suspension rate: 0.0 per 100 students. Combined in-school and out-of-school rate: 0.8 per 100 students. Reported via the Civil Rights Data Collection.
Student demographics
Hispanic or Latino 89.7%
White 3.2%
Asian 2.4%
African American 1.4%
Native Hawaiian / Pacific Islander 1.4%
American Indian / Alaska Native 1.2%
Two or More 0.6%
Largest group: Hispanic or Latino at 89.7% of enrollment.
Student-body diversity index 19.3/100
Simpson diversity index - at 19.3, Arroyo Elementary is less mixed than the California school average of 46.0.
Programs
Gifted & talented Yes
District finance for Ontario-Montclair reports $21,832 per pupil (NCES F-33) - open the district page for the full revenue mix.
How Arroyo Elementary Compares to District-Mates
| School | Enrollment | Economic Profile | Student-Teacher Ratio |
|---|---|---|---|
| Edison Elementary | Larger | Lower economic need | Higher S:T ratio |
| Central Language Academy | Larger | Similar economic need | Higher S:T ratio |
| Ray Wiltsey Middle | Larger | Higher economic need | Lower S:T ratio |
| Oaks Middle | Larger | Similar economic need | Lower S:T ratio |
| Serrano Middle | Larger | Similar economic need | Lower S:T ratio |
Comparisons are relative to Arroyo Elementary's own figures; each column derives from NCES Common Core of Data.
Other Schools in This District
- Enrollment
- 736
- Students per teacher
- 25.4:1
- Resource Index
- 27/100
- Enrollment
- 727
- Students per teacher
- 18.2:1
- Resource Index
- 36/100
- Enrollment
- 668
- Students per teacher
- 21.5:1
- Resource Index
- 21/100
- Enrollment
- 657
- Students per teacher
- 17.3:1
- Resource Index
- 34/100
Similar elementary schools in Ontario
6 comparable elementary schools (grades K-5) serving the same city.
Park View Elementary
Standard public school
844 students 25.6:1 students per teacher
Ranch View Elementary
Standard public school
738 students 30.8:1 students per teacher
Edison Elementary
Standard public school
736 students 26.3:1 students per teacher
Central Language Academy
Standard public school
736 students 25.4:1 students per teacher
Richard Haynes Elementary
Standard public school
641 students 21.4:1 students per teacher
Berlyn Elementary
Standard public school
639 students 22:1 students per teacher
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 (~493 students)
Frequently asked questions about Arroyo Elementary
How many students attend Arroyo Elementary?
Arroyo Elementary has 493 students enrolled. It is an elementary school in Ontario, CA. CCD year-over-year: 467 (2022-23) → 499 (2023-24), up 32.
What is the student-teacher ratio at Arroyo Elementary?
The student-teacher ratio at Arroyo Elementary is 23.5:1, which is 9% higher than the California average of 21.5:1 and 50% higher than the national average of 15.7:1.
What percentage of students receive free lunch at Arroyo Elementary?
67.0% of students at Arroyo Elementary are eligible for free lunch, compared to the California average of 55.5%.
What is the racial and ethnic makeup of Arroyo Elementary?
The largest demographic group at Arroyo Elementary is Hispanic or Latino at 89.7% of enrollment, in Ontario, CA.
What is the Resource Investment Index for Arroyo Elementary?
Arroyo Elementary has a Resource Investment Index of 28/100 (lower 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 Arroyo Elementary rank among elementary schools in Ontario?
By Resource Investment Index, Arroyo Elementary ranks #12 of 26 elementary schools in Ontario, 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 Ontario on the city page.
What other schools are in Ontario-Montclair?
Besides Arroyo Elementary, Ontario-Montclair also operates Edison Elementary (736 students), Central Language Academy (736 students), and Ray Wiltsey Middle (727 students). See the Ontario-Montclair district page for the complete list.