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#6032 of 9,533 schools in CA

William Tell Aggeler Opportunity High

High School · Los Angeles Unified

21050 Plummer St., Chatsworth, CA 91311

Enrollment

68

Student-Teacher

17:1

Score

5.8

Grades

7th – 12th

Updated 2022-23

How this school compares

In Chatsworth

#5 of 8

public schools

California high schools

#1,294 of 1,892

In district

#679 of 769

Los Angeles Unified

School environment

9.5 / 10

Exceptional

About William Tell Aggeler Opportunity High

William Tell Aggeler Opportunity High is an alternative school in Chatsworth, California, nestled within the bustling city of Los Angeles. Serving students from seventh through twelfth grade, this unique institution caters to 68 students with a student-teacher ratio of 17:1, ensuring more personalized attention and support. The school employs four full-time equivalent teachers who work tirelessly to provide an inclusive educational environment.

Despite the low MySchoolScout Rating of 3.1 out of 10 and a state ranking of 8463 out of 9566 schools in California (12th percentile), William Tell Aggeler Opportunity High focuses on fostering a supportive community where each student's growth and development are prioritized over strict academic metrics. With only 2% proficiency or above in both ELA/Reading and Math, the school continues to seek innovative ways to enhance its curriculum and better serve its students. Located in an urban setting, William Tell Aggeler Opportunity High is deeply embedded within the vibrant community of Chatsworth, offering a nurturing space for young learners to thrive.

What Parents Should Know

With an enrollment of 68 students, William Tell Aggeler Opportunity High is a smaller school where families often find a close-knit community atmosphere. Smaller settings can mean more individual attention from teachers and staff, though they may offer fewer extracurricular options than larger schools.

While current test scores at William Tell Aggeler Opportunity High are below average, the school shows strong growth metrics — meaning students are making above-average progress year over year. This upward trajectory can be a positive indicator for families who value a school's ability to help students improve, even if absolute scores haven't caught up yet.

Score Breakdown

Full Profile · 4/4 metrics
Student Progress6.1Above Average25%
Year-over-year improvement in student test scores.
View breakdown
Years of Data2
Annual Change-1 pts/yr
Data Period2019–2024
TrendStable
Academics1.6Significantly Below Average25%
Student proficiency on state tests, adjusted for community poverty levels.
View breakdown
Math Proficiency0%
Reading/ELA Proficiency0%
Math vs. State Avg-28 pts
Reading vs. State Avg-55.9 pts
Overall Proficiency0%
Expected (poverty-adj.)23%
vs. Expected-22.7 pts
Adjusted Percentile2th
College Readiness6.5Above Average30%
Graduation rates, AP course participation, and IB availability.
View breakdown
IB ProgramNo
Resources & Environment9.5Exceptional20%
Student-teacher ratio, per-pupil spending, and attendance.
View breakdown
Student-Teacher Ratio17:1
Per-Pupil Spending$22,030

William Tell Aggeler Opportunity High — Students at William Tell Aggeler Opportunity High score 0% proficient, which is below what's typical for similar communities (expected: 23%).

How we calculate scores →

Equity & Diversity

Shown separately, not included in overall score

Free/Reduced Lunch

91.2%

Students qualifying for federal meal assistance

Test Scores CA CAASPP (2023-24)

Math Proficiency 1.7%
School
State
31.8%
ELA Proficiency 1.7%
School
State
51.5%

Based on 6 test records from CA state assessments. About our data

Proficiency Trend

Average proficiency (% at or above grade level) across Math & ELA over time.

2019
Math
5%
ELA
5%
2024

Source: EdFacts (NCES) and state assessment data. Growth score: 6.1/10.

How William Tell Aggeler Opportunity High Compares

See how William Tell Aggeler Opportunity High performs across key quality dimensions compared to state benchmarks.

Overall Score
5.8/10
37th percentile in CA
Academic
1.6/10
1.6/10
Growth
6.1/10
Above average
Environment
9.5/10
Above average

Funding & Resources

Free/Reduced Lunch
Students eligible for subsidized meals
91%
Teaching Staff
17:1 student-teacher ratio
4 teachers

Location

21050 Plummer St., Chatsworth, CA 91311

Nearby Alternatives

Families considering William Tell Aggeler Opportunity High may also want to explore other high schools in the area. Chatsworth Charter High (rated 6.9/10, 0.8 miles away), which scores notably higher. Additionally, Stoney Point Continuation (rated 6.5/10, 0.7 miles away), which scores slightly higher. For more schools in Chatsworth, see our Chatsworth schools guide .

Nearby Schools

20 within 1.8 mi
School Distance Rating
Aggeler Community Day Chatsworth 0.0 mi
Stoney Point Continuation Chatsworth 0.7 mi 6.5
Ernest Lawrence Middle Chatsworth 0.8 mi 5.7
Chatsworth Charter High Chatsworth 0.8 mi 6.9
ST JOHN EUDES SCHOOL Chatsworth 0.9 mi 6.9
St. John Eudes Chatsworth 0.9 mi
Superior Street Elementary Chatsworth 1.1 mi 7.1
Limerick Avenue Elementary Canoga Park 1.3 mi 9.1
Germain Academy For Academic Achievement Chatsworth 1.4 mi 5.7
Chatsworth Park ES Urban Planning/Comm Development Magnet Chatsworth 1.3 mi 8.3
Nevada Avenue Elementary West Hills 1.6 mi 7.6
Academy for Advancement of Children With Autism Chatsworth 1.5 mi
MONTESSORI OF CHATSWORTH Chatsworth 1.6 mi
Sierra Canyon School Chatsworth 1.9 mi
SIERRA CANYON SCHOOL Chatsworth 2.0 mi 6.0
SIERRA CANYON SCHOOL Chatsworth 2.0 mi 6.8
EGREMONT SCHOOLS Chatsworth 1.8 mi 6.3
CHAMINADE COLLEGE PREPARATORY MIDDLE SCHOOL Chatsworth 1.8 mi 5.0
Egremont Schools, Inc. Chatsworth 1.8 mi
Our Community Charter Chatsworth 1.8 mi 5.3

Neighborhood Census ACS (2019-2023)

Census data for ZIP 91311 (ACS 2019-2023 5-Year Estimates) · Data sources

Median Income

$117,574

Median Home Value

$837,300

Median Rent

$2,199/mo

Population

40,557

College Educated

44.9%

Homeownership

66.8%

Avg Commute

29.1 min

Poverty Rate

7.6%

Median Age

42.3

Community Profile

The community surrounding William Tell Aggeler Opportunity High has a median household income of $117,574. It is a well-educated community where 45% of adults hold a bachelor's degree or higher. The median home value in the area is $837,300, with a median rent of $2,199/month. The local poverty rate of 7.6% is relatively low. The average commute for residents is 29 minutes. Source: U.S. Census ACS 2022 5-Year Estimates.

Similar Schools

Schools in the same state with comparable level, size, and ratings

School Rating
Albert Einstein Continuation North Hills, CA 5.8
BRIDGEPORT VOCATIONAL WEST SCHOOL Los Angeles, CA 5.8
Central High (Continuation) Barstow, CA 5.8
MESIVTA BIRKAS YITZCHOK Los Angeles, CA 5.8
Patricia Dreizler Continuation High Redondo Beach, CA 5.8
Ronald Reagan Academy Dinuba, CA 5.8

Frequently Asked Questions

Common questions about William Tell Aggeler Opportunity High

What grades does William Tell Aggeler Opportunity High serve?

William Tell Aggeler Opportunity High serves students in grades 7th through 12th.

How many students attend William Tell Aggeler Opportunity High?

William Tell Aggeler Opportunity High has an enrollment of approximately 68 students.

What is the student-teacher ratio at William Tell Aggeler Opportunity High?

The student-teacher ratio at William Tell Aggeler Opportunity High is 17:1. A lower ratio generally means more individual attention per student. The national average is approximately 16:1 for public schools.

How does William Tell Aggeler Opportunity High rank in CA?

William Tell Aggeler Opportunity High is ranked #6032 out of 9,533 schools in CA.

What is William Tell Aggeler Opportunity High's MySchoolScout rating?

William Tell Aggeler Opportunity High has a composite rating of 5.8 out of 10 on MySchoolScout. This score combines academic performance, student growth, and school environment into a single score. Equity data is shown separately for context.

What are the test scores at William Tell Aggeler Opportunity High?

Based on the most recent state assessment data, William Tell Aggeler Opportunity High has 1.7% math proficiency and 1.7% reading/ELA proficiency.

Is William Tell Aggeler Opportunity High a charter school?

No, William Tell Aggeler Opportunity High is not a charter school. It is a traditional public school operated by the local school district.

Is William Tell Aggeler Opportunity High a Title I school?

No, William Tell Aggeler Opportunity High is not currently a Title I school.

What does the Free & Reduced Lunch percentage mean for William Tell Aggeler Opportunity High?

91.2% of students at William Tell Aggeler Opportunity High qualify for free or reduced-price lunch. This is a commonly used indicator of economic need and provides important context when interpreting test scores.

11 schools nearby View map →

Neighborhood Context

County Safety
Low (245/100K)

FBI UCR 2024. County-level only. Data >1 year old.

Quick Facts NCES CCD (SY 2022-23)

Grades
7th – 12th
Enrollment
68
Student-Teacher Ratio
17:1
Teachers (FTE)
4
Free/Reduced Lunch
91.2%
Type
alternative
Setting
Large City
County
Los Angeles County
Data Year
2023–2024

District

Los Angeles Unified
District Enrollment
419,929
Schools in District
785
Per-Pupil Spending
$22,687
District Rank
#679 of 769

How We Rate Schools

Every school receives a composite score from 1 to 10 based on four pillars: Academic Performance (50%), Student Growth (20%), Equity (15%), and Learning Environment (15%). Scores are built from publicly available data including standardized test results, enrollment figures, and school climate indicators.

Read our full methodology

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