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Schools›California›Chatsworth
SCHOOL COMMUNITY·LOS ANGELES UNIFIED·NCES 062271002802

William Tell Aggeler Opportunity High

21050 Plummer St., Chatsworth, CA 91311 · (818) 341-1232 · Los Angeles County
GRADES 07–12HIGH11-CITYTITLE IALTERNATIVE EDUCATION SCHOOL61 STUDENTS
Enrollment
61
High
DISTRICT 676 · STATE 838
Student : Teacher
10.0:1
6 FTE teachers
DISTRICT 16.3:1 · STATE 18.2:1
Free / Reduced Lunch
95%
58 students
DISTRICT 84% · STATE 65%
Community
0
0 members
Enrollment and student:teacher ratio compared against other high schools. Free/Reduced Lunch and demographics compared against all schools.
Enrollment by grade
Grade 8
1
Grade 9
23
Grade 10
14
Grade 11
16
Grade 12
7
Student demographics
White
23%
DISTRICT 10% · STATE 20%
Hispanic
5489%
DISTRICT 73% · STATE 56%
Black
23%
DISTRICT 7% · STATE 5%
Asian
12%
DISTRICT 5% · STATE 12%
Two+
23%
DISTRICT 5% · STATE 6%
Student head counts by race/ethnicity from federal NCES enrollment data. Very small groups may be suppressed in the source, so categories do not always sum exactly to total enrollment.
Gender split
Male
3761%
Female
2439%

Discussions

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Test scores

CAASPP 2023-24 . % met or exceeded standard
English Language Arts
0.0%
own-school result
Math
0.0%
own-school result
State assessment results for this school reflect a specialized student population. The figures above are the school's own reported scores; they are not directly comparable to state averages or to general-enrollment schools, so the usual state-average comparison line is suppressed here.
Source: CAASPP. All students, all grades. See all years and grades →

BeatsExpectations

Not computed for this school
BeatsExpectations is not computed for specialized-population schools (schools for the deaf or blind, therapeutic and behavioral-health placements, juvenile-justice and alternative-education settings, and similar). State ELA/Math proficiency rates are not a comparable metric for these populations, so a demographically-adjusted residual against general-enrollment peers would be misleading. About the methodology →

7-year change

SY 2017-18 vs SY 2024-25
Enrollment
61
-31 (-34%) vs 2017
Student : Teacher
10.0:1
was 23.0:1
% White
3%
was 5%
% Hispanic
89%
was 88%
% Black
3%
was 5%
% Asian
2%
was 1%
Source: NCES Common Core of Data

About William Tell Aggeler Opportunity High

Set in Chatsworth, California, William Tell Aggeler Opportunity High is a rural-scale 9-12 campus, overseen by Los Angeles Unified. It works with 61 students across grades 7 through 12. That puts it 93% below the typical public school in California, which averages around 838 students.

Within Los Angeles Unified, which oversees 784 schools and 406,887 students, William Tell Aggeler Opportunity High is one campus in the system.

On demographics, William Tell Aggeler Opportunity High lists that nearly all students (89%) are Hispanic. Beyond that, the school logs 3% White, 3% Black, 3% multiracial. That is considerably more Hispanic than the county at large, where the share is closer to 48%.

Looking at the economic backdrop, The school lists 6 full-time-equivalent teachers, for a student-teacher ratio near 10.0:1. That figure is tighter than the state norm's 18.2:1 average. About 95% of enrolled students meet the income threshold for free or reduced-price lunch, a commonly cited indicator of low-income enrollment. Set against Los Angeles County (around 70%), the school's rate is somewhat above typical.

Zooming out to the county, community-level numbers for Los Angeles County indicate median household earnings sit near $90,112, 36% of adults hold a bachelor's degree or higher, and the poverty rate sits near 10%. In all, Los Angeles County runs 2244 public schools (combined enrollment of about 1,265,907 students), of which William Tell Aggeler Opportunity High is one.

Nearest neighbor: Aggeler Community Day, around 0.0 miles off. 8 of the 8 nearest public schools sit inside a five-mile radius.

William Tell Aggeler Opportunity High operates from a downtown location.

Five-year trend. Looking back 7 years, enrollment at William Tell Aggeler Opportunity High has fell 34%, going from 92 students in 2018 to 61 in 2025. Class-load math has tightened: from 23.0:1 in 2018 to 10.0:1 in 2025.

On this page, members of the William Tell Aggeler Opportunity High community share and discuss science fair prep, picture-day reminders, and bus-route questions. Anyone with firsthand experience at this school can post or comment.

Los Angeles County at a glance

View full county profile
Population
9,808,667
Census ACS
Median income
$90,112
Household, ACS
Bachelor's+
36%
Adults 25+
Poverty rate
10%
Below federal line
Schools in county
2,244
1,265,907 students

Quick facts

School name
William Tell Aggeler Opportunity High
District
Los Angeles Unified
Address
21050 Plummer St., Chatsworth, CA 91311
Phone
(818) 341-1232
County
Los Angeles County
Level
High
Grade range
07–12
Total enrollment
61
Teachers (FTE)
6
Student–teacher ratio
10.0:1
Free/Reduced lunch
58 (95%)
Locale
11-City: Large
NCES ID
062271002802
Charter school
No
Virtual school
No

Related schools

Other schools in Los Angeles Unified
Other schools in Chatsworth
Nearby schools

Frequently asked questions

About William Tell Aggeler Opportunity High
What is the total enrollment at William Tell Aggeler Opportunity High?
William Tell Aggeler Opportunity High enrolls approximately 61 students in grades 07-12.
What grades does William Tell Aggeler Opportunity High serve?
William Tell Aggeler Opportunity High serves grades 07-12.
What is the student-teacher ratio at William Tell Aggeler Opportunity High?
The student-to-teacher ratio at William Tell Aggeler Opportunity High is approximately 10.0:1 (6 FTE teachers).
What is the student diversity at William Tell Aggeler Opportunity High?
Student demographics at William Tell Aggeler Opportunity High are roughly 3% White, 89% Hispanic, 3% Black, 2% Asian, 3% Two or more.
Who oversees William Tell Aggeler Opportunity High?
William Tell Aggeler Opportunity High is overseen by Los Angeles Unified in Los Angeles County.
Data sourceSchool profile facts are sourced from the NCES. Community content is posted by allk12 members.
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