Enrollment
392
California · 2024-25 NCES data
Elementary school (grades K-5) · Altadena, CA
Ocs - South
Federal NCES profile for Ocs - South, including enrollment, faculty, free-lunch eligibility, demographics, and resource indicators - Resource Investment Index 28/100.
2024-25 NCES dataElementary school (grades K-5)NCES 060239914352Charter school
👥 S:T ratio 8
🌟 Gifted program 30
📋 Attendance 45
Scored 0–100 from federal NCES and CRDC indicators, resource allocation, not test scores. Full methodology →
The verdict
Ocs - South earns 28/100 on the Resource Investment Index, with class sizes near the California median. It is also more racially and ethnically mixed than most California schools.
- #5 of 7
- elementary schools in Altadena · Resource Index
- 28
- Resource Index · Lower
- 23.1:1
- students per teacher
- 27.8%
- free-lunch eligible
Ocs - South has class sizes near the California median. Computed live against every California school reporting to NCES.
By Resource Investment Index, Ocs - South ranks #5 of 7 elementary schools in Altadena, CA.
School address
District: Ocs - South District · California
NCES ID 060239914352 Verify on NCES CCD record →
Teachers (FTE)
17.0
Federal CCD staff survey
Students per teacher
23.1:1
vs 21.5:1 California avg
+7% vs state
Free-lunch eligible
27.8%
vs 55.5% California avg
-50% vs state
Student-teacher ratio in context
How Ocs - South compares with California and U.S. medians
What stands out at Ocs - South
Ocs - South is a mid-sized charter elementary school in Altadena, California, enrolling 392 students.
Class loads run somewhat heavier than typical: 23.1:1 puts it in the larger third of California schools by student-teacher ratio.
Economic need runs somewhat below the state's typical profile, with 27.8% of students eligible for free meals.
With 392 students, its enrollment sits close to the California median campus size.
Its Resource Investment Index sits near the middle of the pack among 9,998 scored California schools.
Against 1,029 statewide peers matched on enrollment and economic need, it ranks mid-pack at #675.
Its student body is led by Hispanic or Latino (35%) and White (33%), more mixed than most schools in the state (diversity index 73/100).
Attendance runs somewhat below the norm, with 21.9% of students chronically absent per the 2021-22 civil-rights collection.
The surrounding Ocs - South District spends $10,981 per pupil, 33% below the California average, a leaner-resourced district than most.
Among Altadena's elementary schools, it stands alongside Jackson Elementary (658 students): Ocs - South is smaller than that campus by headcount and runs leaner classes (23.1:1 vs 26.3:1).
Ocs - South District is a single-school charter district, so Ocs - South operates independently rather than alongside district-mates.
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 Ocs - South compares
Ocs - South on the metrics families compare, against California and U.S. means.
| Metric | This school | vs California | California avg | U.S. avg |
|---|---|---|---|---|
| Students per teacher | 23.1:1 | ▲ 7% | 21.5:1 | 15.7:1 |
| Free-lunch eligible | 27.8% | ▼ 50% | 55.5% | 51.7% |
| Enrollment | 392 | top 62% | - | - |
Source: NCES Common Core of Data School-level CCD + state/national means from Public School Universe · 2024-25
23.1:1
Leaner classes than 8% of US schools, heavier class loads than most.
392
Bigger than 46% of US schools by enrollment, mid-sized for the country.
Equity indicators (what these measure)
Economic need
27.8%
free-lunch eligible
- 50% below the California average of 55.5%
Below the 40% Title I threshold; federal aid targets individual qualifying students rather than schoolwide programs.
Staffing depth
23.1:1
students per teacher
- 7% above state mean
Top 63% in California - lower ratio than 37% of state schools
Above 20:1, running heavier than the typical U.S. public school; staffing is comparatively stretched.
Engagement
21.9%
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
$10,981
per pupil, district-wide
- below California avg of $16,509
Well below the U.S. average per-pupil spend, a notably leaner funding position that may affect programs, facilities, and staffing.
Support staff
Counselors0.0 FTE
Student-support staffing from the Civil Rights Data Collection.
Discipline context
8
in-school suspensions + 9 out-of-school
Suspension rate: 2.0 per 100 students. Combined in-school and out-of-school rate: 4.3 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 35.2%
White 33.4%
Two or More 14.3%
Asian 9.9%
African American 7.1%
Largest group: Hispanic or Latino at 35.2% of enrollment.
Student-body diversity index 72.9/100
Simpson diversity index - at 72.9, Ocs - South is more mixed than the California school average of 46.0.
Programs
Funding & spending
District-wide per-pupil expenditure for Ocs - South District, which includes Ocs - South.
$10,981
Per student
-33%
vs California
Avg $16,509
-34%
vs U.S.
Avg $16,593
Revenue mix
Local 56.7%
State 32.7%
Federal 10.6%
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.
Similar elementary schools in Altadena
6 comparable elementary schools (grades K-5) serving the same city.
Jackson Elementary
Standard public school
658 students 26.3:1 students per teacher
Altadena Elementary
Standard public school
527 students 31:1 students per teacher
Odyssey Charter
Standard public school
463 students 25.7:1 students per teacher
Aveson School of Leaders
Standard public school
279 students 17.4:1 students per teacher
Alma Fuerte Public
Standard public school
227 students 28.4:1 students per teacher
Pasadena Rosebud Academy
Standard public school
169 students 16.9:1 students per teacher
Similar elementary 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 (~392 students)
Similar student-teacher ratio (~23.1:1)
Next steps
Verify locally before acting on Ocs - South's federal record.
- Compare Ocs - South against another school. Compare schools
- Ocs - South District'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 Ocs - South
How many students attend Ocs - South?
Ocs - South has 392 students enrolled. It is an elementary school in Altadena, CA.
What is the student-teacher ratio at Ocs - South?
The student-teacher ratio at Ocs - South is 23.1:1, which is 7% higher than the California average of 21.5:1 and 47% higher than the national average of 15.7:1.
What percentage of students receive free lunch at Ocs - South?
27.8% of students at Ocs - South are eligible for free lunch, compared to the California average of 55.5%.
What is the racial and ethnic makeup of Ocs - South?
The largest demographic group at Ocs - South is Hispanic or Latino at 35.2% of enrollment, in Altadena, CA. Its student body is more racially and ethnically mixed than most US schools, with a diversity index of 72.9/100.
What is the Resource Investment Index for Ocs - South?
Ocs - South has a Resource Investment Index of 28/100 (lower reported resources relative to schools nationally) based on 3 factors: student-teacher ratio, attendance rates. Not a test-score or academic measure (national median ~41/100, see methodology).
How does Ocs - South rank among elementary schools in Altadena?
By Resource Investment Index, Ocs - South ranks #5 of 7 elementary schools in Altadena, 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 Altadena on the city page.
Is Ocs - South a good school?
Ocs - South earns 28/100 on the Resource Investment Index, with class sizes near the California median. It is also more racially and ethnically mixed than most California schools. 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 Ocs - South District?
None; Ocs - South District is a single-school charter district, and Ocs - South is its only campus.
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.