- Enrollment
- 1,029
- Students per teacher
- 20.6:1
- Resource Index
- 34/100
High school (grades 9-12) · San Lorenzo, CA
Arroyo High
Federal NCES profile for Arroyo High, including enrollment, faculty, free-lunch eligibility, demographics, and resource indicators - Resource Investment Index 28/100.
2024-25 NCES dataHigh school (grades 9-12)NCES 063471005845
👥 S:T ratio 2
🌟 Gifted program 70
🎓 Counselors 0
📋 Attendance 39
Scored 0–100 from federal NCES and CRDC indicators, resource allocation, not test scores. Full methodology →
The verdict
Arroyo High earns 28/100 on the Resource Investment Index, with class sizes larger than 76% of California schools.
- #3 of 4
- high schools in San Lorenzo · Resource Index
- 28
- Resource Index · Lower
- 24.6:1
- large classes for California
- 49.4%
- free-lunch eligible
Arroyo High has class sizes larger than 76% of California schools. Computed live against every California school reporting to NCES.
By Resource Investment Index, Arroyo High ranks #3 of 4 high schools in San Lorenzo, CA.
School address
District: San Lorenzo Unified · California
NCES ID 063471005845 Verify on NCES CCD record →
CCD year-over-year · 2022-23 → 2023-24
-68 students YoY
Arroyo High held near 1,542 students from 2022-23 to 2023-24 (-68 headcount).
Teacher FTE added 61.1 → 61.8 across the same CCD years.
Source: NCES Common Core of Data public-school universe (2022-23, 2023-24).
Steady CCD campus
-68 students YoY 063471005845 · San Lorenzo, CA High · MID · TRAD
1,499 enr · 24.6:1 · 49.4% lunch · RII 28
Nearest enrollment peer: San Lorenzo High (1,029 students)
Arroyo High held near 1,542 students from 2022-23 to 2023-24 (-68 headcount). Teacher FTE added 61.1 → 61.8 across the same CCD years. Read with this school → · District book → · California schools → · Find another →
Arroyo High in the enrollment neighbourhood
Fall enrollment among this campus and nearest district peers
- This school
Arroyo High
1,499 students
- San Lorenzo Hi
San Lorenzo High
1,029 students
- Bohannon Middl
Bohannon Middle
606 students
- Hesperian Elem 500
Hesperian Elementary
500 students
- Washington Man 500
Washington Manor Middle
500 students
- Edendale Middl 483
Edendale Middle
483 students
What this shows Arroyo High reports 1,499 students on the CCD universe file.
How Arroyo High compares
Arroyo High held steady on CCD headcount: ratios and free-lunch share vs California and U.S. means.
| Metric | This school | vs California | California avg | U.S. avg |
|---|---|---|---|---|
| Students per teacher | 24.6:1 | ▲ 14% | 21.5:1 | 15.7:1 |
| Free-lunch eligible | 49.4% | ▼ 11% | 55.5% | 51.7% |
| Enrollment | 1,499 | top 6% | - | - |
Source: NCES Common Core of Data School-level CCD + state/national means from Public School Universe · 2024-25
24.6:1
Leaner classes than 6% of US schools, heavier class loads than most.
1,499
Bigger than 96% of US schools by enrollment, a large campus nationally.
Equity indicators methodology
Economic need
49.4%
free-lunch eligible
- 11% 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
24.6:1
students per teacher
- 14% above state mean
Top 76% in California - lower ratio than 24% of state schools
Well above 20:1, one of the more stretched staffing loads nationally relative to enrollment.
Engagement
24.3%
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
$17,078
per pupil, district-wide
- below California avg of $18,665
Close to the U.S. public-school average per-pupil spend.
Support staff
Counselors3.0 FTE
Per 508 students, the combined health-and-guidance staffing load for this school.
Discipline context
0
in-school suspensions + 55 out-of-school
Suspension rate: 0.0 per 100 students. Combined in-school and out-of-school rate: 3.7 per 100 students. Reported via the Civil Rights Data Collection.
Student demographics
Hispanic or Latino 49.9%
Asian 30.9%
White 7.4%
African American 5.8%
Two or More 3.7%
Native Hawaiian / Pacific Islander 1.7%
American Indian / Alaska Native 0.5%
Largest group: Hispanic or Latino at 49.9% of enrollment.
Student-body diversity index 64.5/100
Simpson diversity index - at 64.5, Arroyo High is more mixed than the California school average of 46.0.
Programs
AP courses offered 13
Gifted & talented Yes
District finance for San Lorenzo Unified reports $17,078 per pupil (NCES F-33) - open the district page for the full revenue mix.
How Arroyo High Compares to District-Mates
| School | Enrollment | Economic Profile | Student-Teacher Ratio |
|---|---|---|---|
| San Lorenzo High | Smaller | Higher economic need | Lower S:T ratio |
| Bohannon Middle | Smaller | Higher economic need | Lower S:T ratio |
| Hesperian Elementary | Smaller | Higher economic need | Higher S:T ratio |
| Washington Manor Middle | Smaller | Similar economic need | Lower S:T ratio |
| Edendale Middle | 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
- 606
- Students per teacher
- 20.2:1
- Resource Index
- 32/100
- Enrollment
- 500
- Students per teacher
- 26.3:1
- Resource Index
- 17/100
- Enrollment
- 500
- Students per teacher
- 21.7:1
- Resource Index
- 34/100
- Enrollment
- 483
- Students per teacher
- 21:1
- Resource Index
- 22/100
Similar high schools in San Lorenzo
3 comparable high schools (grades 9-12) serving the same city.
Nationwide high 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 (~1,499 students)
Frequently asked questions about Arroyo High
How many students attend Arroyo High?
Arroyo High has 1,499 students enrolled. It is a high school in San Lorenzo, CA. CCD year-over-year: 1,610 (2022-23) → 1,542 (2023-24), nearly flat (-68).
What is the student-teacher ratio at Arroyo High?
The student-teacher ratio at Arroyo High is 24.6:1, which is 14% higher than the California average of 21.5:1 and 57% higher than the national average of 15.7:1.
What percentage of students receive free lunch at Arroyo High?
49.4% 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 49.9% of enrollment, in San Lorenzo, CA. Its student body is more racially and ethnically mixed than most US schools, with a diversity index of 64.5/100.
What is the Resource Investment Index for Arroyo High?
Arroyo High 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 High rank among high schools in San Lorenzo?
By Resource Investment Index, Arroyo High ranks #3 of 4 high schools in San Lorenzo, 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 San Lorenzo on the city page.
What other schools are in San Lorenzo Unified?
Besides Arroyo High, San Lorenzo Unified also operates San Lorenzo High (1,029 students), Bohannon Middle (606 students), and Hesperian Elementary (500 students). See the San Lorenzo Unified district page for the complete list.