Enrollment
1,638
California · 2024-25 NCES data
High school (grades 9-12) · El Monte, CA
Arroyo High
Federal NCES profile for Arroyo High, including enrollment, faculty, free-lunch eligibility, demographics, and resource indicators - Resource Investment Index 36/100.
2024-25 NCES dataHigh school (grades 9-12)NCES 061212001363
👥 S:T ratio 18
📚 AP courses 75
🌟 Gifted program 30
🎓 Counselors 34
📋 Attendance 25
Scored 0–100 from federal NCES and CRDC indicators, resource allocation, not test scores. Full methodology →
The verdict
Arroyo High earns 36/100 on the Resource Investment Index, with class sizes near the California median. It is also one of the largest schools in California.
- #4 of 5
- high schools in El Monte · Resource Index
- 36
- Resource Index · Typical
- 20.5:1
- students per teacher
- 52.8%
- free-lunch eligible
Arroyo High has class sizes near the California median. Computed live against every California school reporting to NCES.
By Resource Investment Index, Arroyo High ranks #4 of 5 high schools in El Monte, CA.
School address
District: El Monte Union High · California
NCES ID 061212001363 Verify on NCES CCD record →
Teachers (FTE)
80.0
Federal CCD staff survey
Students per teacher
20.5:1
vs 21.5:1 California avg
-5% vs state
Free-lunch eligible
52.8%
vs 55.5% California avg
-5% vs state
Student-teacher ratio in context
How Arroyo High compares with California and U.S. medians
What stands out at Arroyo High
Arroyo High is a higher-need, large high school in El Monte, California, enrolling 1,638 students.
Class sizes run a bit leaner than typical: 20.5:1 puts it in the smaller third of California schools by student-teacher ratio.
Its free-meal eligibility rate of 52.8% lands close to the California typical range, neither a high- nor low-need campus by this measure.
By headcount it is one of the larger campuses in California, bigger than 95% of state schools at 1,638 students.
Its Resource Investment Index sits near the middle of the pack among 9,998 scored California schools.
Against 365 statewide peers matched on enrollment and economic need, it ranks mid-pack at #235.
Its student body is led by Hispanic or Latino (72%) and Asian (25%) (diversity index 41/100).
On the academic-pipeline side it reports 15 Advanced Placement courses.
Counselor availability sits well past the ASCA benchmark, roughly 328 students sharing each counselor, though short of the most stretched campuses.
Chronic absenteeism is elevated: 30.2% of students missed 10% or more of school days (2021-22 Civil Rights Data Collection).
Among El Monte's high schools, it stands alongside El Monte High (1,383 students): Arroyo High is larger than that campus by headcount and runs heavier classes (20.5:1 vs 18.2:1).
El Monte Union High also operates Rosemead High (1,691 students) and El Monte High (1,383 students) alongside Arroyo High.
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 Arroyo High compares
Arroyo High on the metrics families compare, against California and U.S. means.
| Metric | This school | vs California | California avg | U.S. avg |
|---|---|---|---|---|
| Students per teacher | 20.5:1 | ▼ 5% | 21.5:1 | 15.7:1 |
| Free-lunch eligible | 52.8% | ▼ 5% | 55.5% | 51.7% |
| Enrollment | 1,638 | top 5% | - | - |
Source: NCES Common Core of Data School-level CCD + state/national means from Public School Universe · 2024-25
20.5:1
Leaner classes than 14% of US schools, heavier class loads than most.
1,638
Bigger than 97% of US schools by enrollment, a large campus nationally.
Equity indicators (what these measure)
Economic need
52.8%
free-lunch eligible
- 5% below the California average of 55.5%
Above the 40% Title I schoolwide threshold; federal funds support the whole school, not individual students.
Staffing depth
20.5:1
students per teacher
- 5% below state mean
Top 39% in California - lower ratio than 61% of state schools
Above 20:1, running heavier than the typical U.S. public school; staffing is comparatively stretched.
Engagement
30.2%
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
$18,953
per pupil, district-wide
- above California avg of $16,509
Somewhat above the U.S. public-school average, reflecting higher local or state investment per enrolled student.
Support staff
Counselors5.0 FTE
Per 328 students, the combined health-and-guidance staffing load for this school.
Discipline context
0
in-school suspensions + 81 out-of-school
Suspension rate: 0.0 per 100 students. Combined in-school and out-of-school rate: 4.9 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 72.4%
Asian 24.9%
White 1.7%
Two or More 0.6%
African American 0.3%
Native Hawaiian / Pacific Islander 0.1%
Largest group: Hispanic or Latino at 72.4% of enrollment.
Student-body diversity index 41.3/100
Simpson diversity index - at 41.3, Arroyo High is less mixed than the California school average of 46.0.
Programs
AP courses offered 15
Funding & spending
District-wide per-pupil expenditure for El Monte Union High, which includes Arroyo High.
$18,953
Per student
+15%
vs California
Avg $16,509
+14%
vs U.S.
Avg $16,593
Revenue mix
Local 27.5%
State 60.9%
Federal 11.5%
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 Arroyo High Compares to District-Mates
| School | Enrollment | Economic Profile | Student-Teacher Ratio |
|---|---|---|---|
| Rosemead High | Similar size | Similar economic need | Similar S:T ratio |
| El Monte High | Similar size | Similar economic need | Lower S:T ratio |
| South El Monte High | Smaller | Similar economic need | Lower S:T ratio |
| Mountain View High | Smaller | Higher economic need | Lower S:T ratio |
| Fernando R. Ledesma Continuation High | Smaller | Higher economic need | Lower S:T ratio |
Comparisons are relative to Arroyo High's own figures; each column derives from NCES Common Core of Data.
Other Schools in This District
- Enrollment
- 1,691
- Students per teacher
- 21.4:1
- Resource Index
- 35/100
- Enrollment
- 1,383
- Students per teacher
- 18.2:1
- Resource Index
- 29/100
- Enrollment
- 1,125
- Students per teacher
- 18.1:1
- Resource Index
- 31/100
- Enrollment
- 1,123
- Students per teacher
- 17.3:1
- Resource Index
- 26/100
- Enrollment
- 293
- Students per teacher
- 16.3:1
- Resource Index
- 45/100
Similar high schools in El Monte
4 comparable high schools (grades 9-12) serving the same city.
El Monte High
Standard public school
1,383 students 18.2:1 students per teacher
Mountain View High
Standard public school
1,123 students 17.3:1 students per teacher
Fernando R. Ledesma Continuation High
Alternative education program
293 students 16.3:1 students per teacher
El Monte Union High School Community Day
Alternative education program
25 students 12.5:1 students per teacher
Similar high 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 (~1,638 students)
Next steps
Verify locally before acting on Arroyo High's federal record.
- Compare Arroyo High against another school. Compare schools
- El Monte Union High'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 Arroyo High
How many students attend Arroyo High?
Arroyo High has 1,638 students enrolled. It is a high school in El Monte, CA.
What is the student-teacher ratio at Arroyo High?
The student-teacher ratio at Arroyo High is 20.5:1, which is 5% lower than the California average of 21.5:1 and 31% higher than the national average of 15.7:1. Lower ratios generally mean more individual attention per student.
What percentage of students receive free lunch at Arroyo High?
52.8% of students at Arroyo High are eligible for free lunch, compared to the California average of 55.5%.
What is the racial and ethnic makeup of Arroyo High?
The largest demographic group at Arroyo High is Hispanic or Latino at 72.4% of enrollment, in El Monte, CA.
What is the Resource Investment Index for Arroyo High?
Arroyo High has a Resource Investment Index of 36/100 (typical reported resources relative to schools nationally) based on 5 factors: student-teacher ratio, AP course offerings, counselor availability, attendance rates. Not a test-score or academic measure (national median ~41/100, see methodology).
How does Arroyo High rank among high schools in El Monte?
By Resource Investment Index, Arroyo High ranks #4 of 5 high schools in El Monte, CA. This compares federal resource and staffing data among local peers; it is not a test-score or academic ranking. See all high schools in El Monte on the city page.
Is Arroyo High a good school?
Arroyo High earns 36/100 on the Resource Investment Index, with class sizes near the California median. It is also one of the largest schools in California. 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 El Monte Union High?
Besides Arroyo High, El Monte Union High also operates Rosemead High (1,691 students), El Monte High (1,383 students), and South El Monte High (1,125 students). See the El Monte Union High 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.