- Enrollment
- 2,317
- Students per teacher
- 24.4:1
- Resource Index
- 30/100
Middle school (grades 6-8) · Valencia, CA
Arroyo Seco Junior High
Federal NCES profile for Arroyo Seco Junior High, including enrollment, faculty, free-lunch eligibility, demographics, and resource indicators - Resource Investment Index 28/100.
2024-25 NCES dataMiddle school (grades 6-8)NCES 064251006956
👥 S:T ratio 0
🌟 Gifted program 30
🎓 Counselors 17
📋 Attendance 63
Scored 0–100 from federal NCES and CRDC indicators, resource allocation, not test scores. Full methodology →
The verdict
Arroyo Seco Junior High earns 28/100 on the Resource Investment Index, with class sizes larger than 81% of California schools. It is also more racially and ethnically mixed than most California schools.
- #11 of 13
- public schools in Valencia · Resource Index
- 28
- Resource Index · Lower
- 25.3:1
- large classes for California
- 16.4%
- free-lunch eligible
Arroyo Seco Junior High has class sizes larger than 81% of California schools. Computed live against every California school reporting to NCES.
By Resource Investment Index, Arroyo Seco Junior High ranks #11 of 13 public schools in Valencia, CA.
School address
District: William S. Hart Union High · California
NCES ID 064251006956 Verify on NCES CCD record →
CCD year-over-year · 2022-23 → 2023-24
+23 students YoY
Arroyo Seco Junior High held near 1,240 students from 2022-23 to 2023-24 (+23 headcount).
Teacher FTE added 49.9 → 51.6 across the same CCD years.
Source: NCES Common Core of Data public-school universe (2022-23, 2023-24).
Steady CCD campus
+23 students YoY 064251006956 · Valencia, CA Middle · MID · TRAD
1,239 enr · 25.3:1 · 16.4% lunch · RII 28
Nearest enrollment peer: Saugus High (2,317 students)
Arroyo Seco Junior High held near 1,240 students from 2022-23 to 2023-24 (+23 headcount). Teacher FTE added 49.9 → 51.6 across the same CCD years. Read with this school → · District book → · California schools → · Find another →
Arroyo Seco Junior High in the enrollment neighbourhood
Fall enrollment among this campus and nearest district peers
- Saugus High
Saugus High
2,317 students
- Valencia High
Valencia High
2,286 students
- Golden Valley
Golden Valley High
1,980 students
- Canyon High
Canyon High
1,952 students
- William S. Har
William S. Hart High
1,941 students
- This school
Arroyo Seco Junior High
1,239 students
What this shows Arroyo Seco Junior High reports 1,239 students on the CCD universe file.
How Arroyo Seco Junior High compares
Arroyo Seco Junior 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 | 25.3:1 | ▲ 18% | 21.5:1 | 15.7:1 |
| Free-lunch eligible | 16.4% | ▼ 70% | 55.5% | 51.7% |
| Enrollment | 1,239 | top 8% | - | - |
Source: NCES Common Core of Data School-level CCD + state/national means from Public School Universe · 2024-25
25.3:1
Leaner classes than 5% of US schools, heavier class loads than most.
1,239
Bigger than 94% of US schools by enrollment, a large campus nationally.
Equity indicators methodology
Economic need
16.4%
free-lunch eligible
- 70% below the California average of 55.5%
Below the 40% Title I threshold, among the lower-need profiles in the state; federal aid targets individual qualifying students rather than schoolwide programs.
Staffing depth
25.3:1
students per teacher
- 18% above state mean
Top 81% in California - lower ratio than 19% of state schools
Well above 20:1, one of the more stretched staffing loads nationally relative to enrollment.
Engagement
14.9%
chronically absent (missed 10%+ of school days)
In the 10-15% range, above the pre-pandemic national baseline but within the broader post-pandemic picture.
Funding equity
$15,249
per pupil, district-wide
- below California avg of $18,665
Somewhat below the U.S. average per-pupil spend; funding constraints may affect programs, facilities, and staffing.
Support staff
Counselors3.0 FTE
Per 413 students, the combined health-and-guidance staffing load for this school.
Discipline context
6
in-school suspensions + 28 out-of-school
Suspension rate: 0.5 per 100 students. Combined in-school and out-of-school rate: 2.7 per 100 students. Reported via the Civil Rights Data Collection.
Student demographics
Hispanic or Latino 38.2%
White 38.1%
Asian 13.2%
Two or More 7.2%
African American 3.0%
American Indian / Alaska Native 0.3%
Largest group: Hispanic or Latino at 38.2% of enrollment.
Student-body diversity index 68.5/100
Simpson diversity index - at 68.5, Arroyo Seco Junior High is more mixed than the California school average of 46.0.
Programs
District finance for William S. Hart Union High reports $15,249 per pupil (NCES F-33) - open the district page for the full revenue mix.
How Arroyo Seco Junior High Compares to District-Mates
| School | Enrollment | Economic Profile | Student-Teacher Ratio |
|---|---|---|---|
| Saugus High | Larger | Similar economic need | Similar S:T ratio |
| Valencia High | Larger | Similar economic need | Lower S:T ratio |
| Golden Valley High | Larger | Higher economic need | Lower S:T ratio |
| Canyon High | Larger | Higher economic need | Lower S:T ratio |
| William S. Hart High | Larger | Higher economic need | Lower S:T ratio |
Comparisons are relative to Arroyo Seco Junior High's own figures; each column derives from NCES Common Core of Data.
Other Schools in This District
- Enrollment
- 2,286
- Students per teacher
- 22.9:1
- Resource Index
- 28/100
- Enrollment
- 1,980
- Students per teacher
- 22:1
- Resource Index
- 31/100
- Enrollment
- 1,952
- Students per teacher
- 23.2:1
- Resource Index
- 28/100
- Enrollment
- 1,941
- Students per teacher
- 21.6:1
- Resource Index
- 32/100
Nationwide middle 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 (~1,239 students)
Frequently asked questions about Arroyo Seco Junior High
How many students attend Arroyo Seco Junior High?
Arroyo Seco Junior High has 1,239 students enrolled. It is a middle school in Valencia, CA. CCD year-over-year: 1,217 (2022-23) → 1,240 (2023-24), nearly flat (+23).
What is the student-teacher ratio at Arroyo Seco Junior High?
The student-teacher ratio at Arroyo Seco Junior High is 25.3:1, which is 18% higher than the California average of 21.5:1 and 61% higher than the national average of 15.7:1.
What percentage of students receive free lunch at Arroyo Seco Junior High?
16.4% of students at Arroyo Seco Junior High are eligible for free lunch, compared to the California average of 55.5%.
What is the racial and ethnic makeup of Arroyo Seco Junior High?
The largest demographic group at Arroyo Seco Junior High is Hispanic or Latino at 38.2% of enrollment, in Valencia, CA. Its student body is more racially and ethnically mixed than most US schools, with a diversity index of 68.5/100.
What is the Resource Investment Index for Arroyo Seco Junior High?
Arroyo Seco Junior 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 Seco Junior High rank among public schools in Valencia?
By Resource Investment Index, Arroyo Seco Junior High ranks #11 of 13 public schools in Valencia, CA. This compares federal resource and staffing data among local peers; it is not a test-score or academic ranking. See all public schools in Valencia on the city page.
What other schools are in William S. Hart Union High?
Besides Arroyo Seco Junior High, William S. Hart Union High also operates Saugus High (2,317 students), Valencia High (2,286 students), and Golden Valley High (1,980 students). See the William S. Hart Union High district page for the complete list.