School overview
At a glance
Reported students
1,239
NCES CCD 2024–25, where reported
Teachers (FTE)
50.83
NCES CCD 2024–25
Student–teacher ratio
24.4:1
Calculated, not a class-size measure
Grades served
07–08
NCES preliminary directory 2025–26
School benchmarks
California middle enrollment
96th percentile
Compared with 1,370 same-level schools reporting enrollment.
District median enrollment
1,148.5
Arroyo Seco Junior High: 1,239 reported students.
State peer staffing position
89th percentile
24.4:1 reported; state peer median 21:1. Ratio is not class size.
Profile interpretation
What the reported data says about Arroyo Seco Junior High
Arroyo Seco Junior High is a public middle school serving grades 07–08 in Valencia. It is one of 16 current school records connected to William S. Hart Union High. NCES reports 1,239 students for 2024–25.
Among 1,370 middle schools in California with comparable records, this school is larger than the reported median of 646 students. Its enrollment is at approximately the 96th percentile for that peer group. Size describes the campus, not instructional quality.
The reported student–teacher ratio is 24.4:1, above the California median of 21:1 for the same school level. This ratio uses total enrollment and teacher FTE; it is not an average classroom headcount and can be affected by special programs or part-time staffing.
The two largest reported race and ethnicity groups are Hispanic or Latino (38.2%) and White (38.1%). English learners represent 5.2% of enrollment. Students served under IDEA represent 19%. These figures help families understand who the school serves; they are not rating inputs.
Turn data into a school visit
Questions worth asking Arroyo Seco Junior High
- 1How do the reported 24.4:1 student–teacher ratio and 50.83 teacher FTE translate into actual class sizes by grade?
- 2Which advanced, gifted, career, arts, and computer-science courses are available this year, and how do students qualify?
- 3How are the school's 3 counselor FTE allocated across grades and student needs?
- 4What meal assistance, transportation, after-school, and family-support services are currently available?
Student context
Enrollment needs
- English learners
- 5.2%
- Students with disabilities
- 19%
- Free/reduced-price lunch
- 17.2%
- Lunch program
- Yes under Provision 2
People available to students
Support staff
- Counselors (FTE)
- 3
- Nurses (FTE)
- 0.19
- Psychologists (FTE)
- 1.44
- Social workers (FTE)
- 0.63
Student demographics
Race and ethnicity share of reported enrollment
- White38.1%
- Hispanic38.2%
- Black3%
- Asian13.2%
- American Indian / Alaska Native0.3%
- Native Hawaiian / Pacific Islander0%
- Multiracial7.2%
Race/ethnicity: NCES CCD 2024–25 where reported, otherwise CRDC 2021–22. English learner and disability context: CRDC 2021–22. Privacy rules can produce missing values.
Learning opportunities
Programs reported by the school
Advanced Placement
Not reported
Gifted and talented
Not reported as offered
Computer science
Not reported
Program availability is from CRDC 2021–22 and can change. Confirm current courses and eligibility with the school.
Continue exploring
Other schools in William S. Hart Union High
Start with campuses at the same school level or with similar reported enrollment.
Rio Norte Junior High
Middle · Grades 07–08
1,138 reported students
La Mesa Junior High
Middle · Grades 07–08
1,017 reported students
Sierra Vista Junior High
Middle · Grades 07–08
946 reported students
Placerita Junior High
Middle · Grades 07–08
940 reported students
Rancho Pico Junior High
Middle · Grades 07–08
842 reported students
Castaic High
High · Grades 09–12
1,159 reported students