William Tell Aggeler Opportunity High

Summary:

William Tell Aggeler Opportunity High is a public high school located in Chatsworth, California, serving grades 7-12 with a total enrollment of 58 students. This school, part of the Los Angeles Unified school district, has consistently ranked among the lowest-performing high schools in the state, with a 0 or 1 out of 5 stars rating from SchoolDigger for most of the past decade.

The school's performance is particularly concerning, with extremely low graduation rates ranging from 0% to 21.6% over the past five years, far below the state and district averages. Correspondingly, the school has had very high dropout rates, ranging from 5.7% to 43.5% in recent years. Additionally, William Tell Aggeler Opportunity High has struggled with extremely high chronic absenteeism, with rates ranging from 76% to 94.4% in recent years. Academically, the school has had 0% of students proficient in English Language Arts, Math, and Science, compared to state proficiency rates of 55.73%, 27.9%, and 30.7%, respectively.

When compared to nearby high schools, such as Northridge Academy High and Grover Cleveland Charter High, William Tell Aggeler Opportunity High stands out as an outlier, with significantly lower graduation rates, higher dropout rates, and much lower academic proficiency. The school's performance is particularly concerning for certain student subgroups, ranking in the bottom 1-2% of California high schools for Hispanic students, special education students, and students from low socioeconomic backgrounds.


Detail:

Public 7-12

 21050 Plummer St.
       Chatsworth, CA  91311-4903


(818) 341-1232

District: Los Angeles Unified

SchoolDigger Rank:
2293rd of 2,323 California High Schools

Per Pupil Expenditures:  $35,585 Help


Student/teacher ratio:  16.7 Help
Number of students:  68

Racial breakdown:

Hispanic:
88.2%
White:
4.4%
African American:
2.9%
more

Free/discounted lunch recipients:  91.2% Help


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Performance Trends
Help
Compare Details William Tell Aggeler Opportunity High is not ranked due for the most recent year due to insufficient test score data. (See more...)
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Compare Details In 2019 the calculated Average Standard Score was 4.58. (See more...)
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Compare Details William Tell Aggeler Opportunity High ranks worse than 98.7% of high schools in California. It also ranks 157th among 158 ranked high schools in the Los Angeles Unified School District. (See more...)
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Compare Details In 2024 the calculated Average Standard Score was 5.78. (See more...)
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The four-year cohort graduation rate measures the percentage of students at William Tell Aggeler Opportunity High who earn a standard high school diploma within four years of starting ninth grade.
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The high school dropout rate measures the percentage of students who do not complete their high school education.
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Chronic absenteeism in a school refers to a situation where students repeatedly miss school, with the threshold often defined as missing 10% or more of school days for any reason, excused or unexcused.
Student Body
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Compare Details Racial makeup is: Hispanic (88.2%), White (4.4%), African American (2.9%). (See more...)
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Compare Details 91.2% of students are receiving a free or discounted lunch. (See more...)
Teachers
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Compare Details The student/teacher ratio at William Tell Aggeler Opportunity High is 16.7, which is the 60th best among 158 high schools in the Los Angeles Unified School District. (See more...)
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Compare William Tell Aggeler Opportunity High employs 4 full-time teachers.
Finance
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Compare Details The average total spent per student at William Tell Aggeler Opportunity High is $35,585, which is the 11th highest among 158 high schools in the Los Angeles Unified School District.
Schooldigger 2019 Rankings:

William Tell Aggeler Opportunity High:

SchoolDigger ranks William Tell Aggeler Opportunity High 2293rd of 2323 California public high schools. (See William Tell Aggeler Opportunity High in the ranking list.)

High School Test Score Ratings by Student Subgroup:


Low Socio Economic Status students:
Hispanic students:


Los Angeles Unified:

SchoolDigger ranks Los Angeles Unified 871st of 1568 California school districts. (See district ranking list.)


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Rank History for William Tell Aggeler Opportunity High

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Rank History for all middle school students at William Tell Aggeler Opportunity High

Year Avg Standard Score Statewide Rank Total # Ranked Middle Schools CA State Percentile SchoolDigger Rating
2008 8.38 1903rd 2005 5.1%
2015 2.92 2473rd 2477 0.2%
2016 2.58 2495th 2497 0.1%
2019 4.58 2693rd 2715 0.8%
See the entire list of California High School Rankings!

Rank History for middle school Low Socio Economic Status students at William Tell Aggeler Opportunity High

Year Avg Standard Score Statewide Rank Total # Ranked Middle Schools CA State Percentile SchoolDigger Rating
2019 4.51 2355th 2369 0.6%
See the entire list of Best California High Schools for Low Socio Economic Status Students!

Rank History for middle school Male students at William Tell Aggeler Opportunity High

Year Avg Standard Score Statewide Rank Total # Ranked Middle Schools CA State Percentile SchoolDigger Rating
2019 4.72 2395th 2407 0.5%
See the entire list of Best California High Schools for Male Students!

Rank History for middle school Hispanic students at William Tell Aggeler Opportunity High

Year Avg Standard Score Statewide Rank Total # Ranked Middle Schools CA State Percentile SchoolDigger Rating
2019 4.25 2201st 2213 0.5%
See the entire list of Best California High Schools for Hispanic Students!

Data source: test scores: California Department of Education, rankings: SchoolDigger.com

Rank History for William Tell Aggeler Opportunity High

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Rank History for all high school students at William Tell Aggeler Opportunity High

Year Avg Standard Score Statewide Rank Total # Ranked High Schools CA State Percentile SchoolDigger Rating
2005 7.55 1745th 1901 8.2%
2006 8.21 1793rd 1968 8.9%
2007 8.01 1895th 2063 8.1%
2008 8.49 1912th 2117 9.7%
2009 13.32 1953rd 2238 12.7%
2010 31.00 1253rd 2281 45.1%
2011 25.25 1455th 2367 38.5%
2012 14.48 1830th 2354 22.3%
2013 21.14 1602nd 2426 34.0%
2016 9.81 1881st 2039 7.7%
2017 11.92 1711th 2021 15.3%
2018 8.95 1965th 2017 2.6%
2019 9.72 2068th 2133 3.0%
2023 7.18 2258th 2348 3.8%
2024 5.78 2293rd 2323 1.3%
See the entire list of California High School Rankings!

Rank History for high school Special Education students at William Tell Aggeler Opportunity High

Year Avg Standard Score Statewide Rank Total # Ranked High Schools CA State Percentile SchoolDigger Rating
2023 14.49 1526th 1547 1.4%
See the entire list of Best California High Schools for Special Education Students!

Rank History for high school Low Socio Economic Status students at William Tell Aggeler Opportunity High

Year Avg Standard Score Statewide Rank Total # Ranked High Schools CA State Percentile SchoolDigger Rating
2018 9.31 1802nd 1862 3.2%
2019 8.71 1926th 1937 0.6%
2023 7.54 2139th 2247 4.8%
2024 5.74 2207th 2235 1.3%
See the entire list of Best California High Schools for Low Socio Economic Status Students!

Rank History for high school Female students at William Tell Aggeler Opportunity High

Year Avg Standard Score Statewide Rank Total # Ranked High Schools CA State Percentile SchoolDigger Rating
2023 4.98 2108th 2118 0.5%
See the entire list of Best California High Schools for Female Students!

Rank History for high school Male students at William Tell Aggeler Opportunity High

Year Avg Standard Score Statewide Rank Total # Ranked High Schools CA State Percentile SchoolDigger Rating
2023 5.97 2175th 2207 1.4%
2024 5.54 2147th 2172 1.2%
See the entire list of Best California High Schools for Male Students!

Rank History for high school Hispanic students at William Tell Aggeler Opportunity High

Year Avg Standard Score Statewide Rank Total # Ranked High Schools CA State Percentile SchoolDigger Rating
2018 8.71 1684th 1742 3.3%
2019 8.12 1799th 1814 0.8%
2023 7.25 2038th 2142 4.9%
2024 5.44 2093rd 2125 1.5%
See the entire list of Best California High Schools for Hispanic Students!

Data source: test scores: California Department of Education, rankings: SchoolDigger.com

As you review the school rankings data, please be aware that some of the information from certain demographics is missing. The reason for this omission is that the data has been redacted from the source data itself due to low population samples in these specific demographic groups.

Redacting data from low population samples is a necessary step to ensure the reliability and accuracy of the results, as small sample sizes may not be representative of the broader population. Additionally, this measure helps protect the privacy of individuals belonging to these demographic groups.

William Tell Aggeler Opportunity High Test Scores
Tests: 
  
Grades: 
  
Years: 
  
Group by: 
District Scores:
State Scores:    
  
Subgroup: 




Data source: California Department of Education

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Enrollment information for William Tell Aggeler Opportunity High

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Year White African American Asian Hispanic American Indian Pacific Islander Two or More Races Not Specified Total
1988 63 10 3 39 0 n/a n/a 0 115
1989 60 16 2 41 0 n/a n/a 0 119
1990 39 19 3 46 0 n/a n/a 0 107
1991 37 29 1 38 0 n/a n/a 0 105
1992 38 21 1 48 0 n/a n/a 0 108
1993 42 27 5 46 0 n/a n/a 0 120
1994 41 26 5 55 0 n/a n/a 0 127
1995 42 15 3 59 0 n/a n/a 0 119
1996 42 15 3 59 0 n/a n/a 0 119
1997 44 16 3 51 0 n/a n/a 0 114
1998 6 1 0 4 0 n/a n/a 0 11
1999 2 2 0 2 0 n/a n/a 0 6
2000 1 2 0 2 0 n/a n/a 0 5
2001 0 1 1 1 0 n/a n/a 0 3
2002 2 3 1 1 0 n/a n/a 0 7
2003 2 3 1 1 0 n/a n/a 0 7
2004 5 1 1 11 0 n/a n/a 0 18
2005 2 1 1 8 0 n/a n/a 0 12
2006 2 1 0 8 0 n/a n/a 0 11
2007 0 0 0 10 0 n/a n/a 0 10
2008 4 1 1 9 n/a n/a n/a 0 15
2009 3 1 0 23 0 0 1 0 28
2010 11 4 1 46 0 2 0 0 64
2011 7 2 1 46 0 0 3 0 59
2012 6 0 1 55 0 0 0 0 62
2013 5 8 1 77 0 0 0 0 91
2014 2 9 3 75 0 0 0 0 89
2015 6 5 0 88 0 0 0 0 99
2016 8 3 1 72 0 0 0 0 84
2017 7 3 1 81 0 0 0 0 92
2018 5 5 1 81 0 0 0 0 92
2019 5 7 3 77 0 0 0 0 92
2020 5 2 2 69 1 0 0 0 79
2021 8 2 2 96 0 0 0 0 108
2022 6 3 1 99 0 0 0 0 109
2023 0 0 0 0 0 0 0 58 58
2024 3 2 1 60 0 0 2 0 68

Data source: National Center for Education Statistics, U.S. Dept of Education.

About Enrollment/Ethnicity

For more information about how the Department of Education defines ethnicity, see Defining Race and Ethnicity Data, National Center for Education Statistics

Students eligible for free or discounted lunch at William Tell Aggeler Opportunity High

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Compare
Year # Students Full-time Teachers Student/Teacher ratio % Free/Discounted Lunch
1988 115 8.0 14.3 n/a
1989 119 8.0 14.8 n/a
1990 107 9.3 11.5 n/a
1991 105 9.3 11.2 n/a
1992 108 9.5 11.3 29.6
1993 120 9.3 12.9 25.8
1994 127 11.3 11.2 26
1995 119 10.3 11.6 23.5
1996 119 10.3 11.6 23.5
1997 114 10.2 11.2 94.7
1998 11 11.4 1.0 0
1999 6 10.0 0.6 50
2000 5 11.0 0.5 0
2001 3 11.0 0.3 n/a
2002 7 2.0 3.5 57.1
2003 7 2.0 3.5 57.1
2004 18 2.0 9.0 83.3
2005 12 2.8 4.3 75
2006 11 2.0 5.5 72.7
2007 10 2.0 5.0 70
2008 15 3.0 5.0 66.7
2009 28 2.0 9.3 67.9
2010 64 4.0 16.0 82.8
2011 59 n/a n/a 67.8
2012 62 5.0 12.4 95.2
2013 91 3.5 26.0 49.5
2014 89 4.5 19.7 92.1
2015 99 4.0 24.7 64.6
2016 84 4.0 21.0 88.1
2017 92 4.0 23.0 93.5
2018 92 4.0 23.0 82.6
2019 92 4.0 23.0 72.8
2020 79 n/a n/a 88.6
2021 108 6.5 16.6 92.6
2022 109 4.0 27.2 95.4
2023 58 2.9 19.3 96.6
2024 68 4.0 16.7 91.2

Data source: National Center for Education Statistics, U.S. Dept of Education.

About Students eligible for discounted/free lunch:

The National School Lunch Program (NSLP) provides low-cost or free meals to students in U.S. public and nonprofit private schools based on household income. Those with incomes below 130% of the poverty line receive free lunch, while those between 130% and 185% qualify for reduced-price lunch. The percentage of students receiving free or reduced-price lunch serves as a marker for poverty, as it reflects the socioeconomic status of families in a given school or district. A higher FRPL rate typically indicates a higher concentration of low-income families, suggesting that the school or district may face additional challenges in providing adequate resources and support for student success.

Student/Teacher Ratio William Tell Aggeler Opportunity High

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Year # Students Full-time Teachers Student/Teacher ratio % Free/Discounted Lunch
1988 115 8.0 14.3 n/a
1989 119 8.0 14.8 n/a
1990 107 9.3 11.5 n/a
1991 105 9.3 11.2 n/a
1992 108 9.5 11.3 29.6
1993 120 9.3 12.9 25.8
1994 127 11.3 11.2 26
1995 119 10.3 11.6 23.5
1996 119 10.3 11.6 23.5
1997 114 10.2 11.2 94.7
1998 11 11.4 1.0 0
1999 6 10.0 0.6 50
2000 5 11.0 0.5 0
2001 3 11.0 0.3 n/a
2002 7 2.0 3.5 57.1
2003 7 2.0 3.5 57.1
2004 18 2.0 9.0 83.3
2005 12 2.8 4.3 75
2006 11 2.0 5.5 72.7
2007 10 2.0 5.0 70
2008 15 3.0 5.0 66.7
2009 28 2.0 9.3 67.9
2010 64 4.0 16.0 82.8
2011 59 n/a n/a 67.8
2012 62 5.0 12.4 95.2
2013 91 3.5 26.0 49.5
2014 89 4.5 19.7 92.1
2015 99 4.0 24.7 64.6
2016 84 4.0 21.0 88.1
2017 92 4.0 23.0 93.5
2018 92 4.0 23.0 82.6
2019 92 4.0 23.0 72.8
2020 79 n/a n/a 88.6
2021 108 6.5 16.6 92.6
2022 109 4.0 27.2 95.4
2023 58 2.9 19.3 96.6
2024 68 4.0 16.7 91.2

Data source: National Center for Education Statistics, U.S. Dept of Education.

About Student-Teacher Ratio

Student/teacher ratio is calculated by dividing the total number of students by the total number of full-time equivalent teachers. Please note that a smaller student/teacher ratio does not necessarily translate to smaller class size. In some instances, schools hire teachers part time, and some teachers are hired for specialized instruction with very small class sizes. These and other factors contribute to the student/teacher ratio. Note: For private schools, Student/teacher ratio may not include Pre-Kindergarten.
Finances

Per Pupil Expenditures for William Tell Aggeler Opportunity High

Help

YearTotal Expenditures Per Pupil
2018 $35,585

Data source: California Department of Education
Pre and Post Pandemic Data

Impact of COVID-19 on William Tell Aggeler Opportunity High

The coronavirus has had a profound impact on education in America. Learning shifted online overnight, attendance numbers dwindled, and enrollment decreased. SchoolDigger.com is making it easier for you to better assess how COVID-19 has impacted your school. Through the collection of pre-pandemic (2019) and current data, SchoolDigger.com is sharing test scores, enrollment numbers and school demographics from schools across the country – and we make it easy to see how impacted schools compare locally and statewide.

Rankings

Rank
Pre-pandemic (2018-2019)
Rank
Post pandemic (2022-2023)
Change (%)
Ranks 2068th of 2133 High schoolsRanks 2258th of 2348 High schools
 0.8%

Test Scores

% proficient
Pre-pandemic (2018-2019)
% proficient
Post pandemic (2022-2023)
Change (%)
11th Grade English Language Arts/Literacy (William Tell Aggeler Opportunity High)6.74.2
 2.5%
   11th Grade English Language Arts/Literacy (Los Angeles Unified)51.748.9
 2.8%
   11th Grade English Language Arts/Literacy (California)57.355.4
 1.9%
11th Grade Mathematics (William Tell Aggeler Opportunity High)00
   11th Grade Mathematics (Los Angeles Unified)25.320
 5.4%
   11th Grade Mathematics (California)32.227.4
 4.9%

Student Body

Number of students
Pre-pandemic (2018-2019)
Number of students
Post pandemic (2022-2023)
Change (%)
Total Students9258
 37%
African American70
 100%
American Indian00
Asian30
 100%
Hispanic770
 100%
Pacific Islander00
White50
 100%
Two or More Races00
% Free/Discounted Lunch Recipients72.8%96.6%
 23.7%


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Frequently Asked Questions about William Tell Aggeler Opportunity High

William Tell Aggeler Opportunity High ranks in the bottom 1.3% of California high schools.

In the 2023-24 school year, 68 students attended William Tell Aggeler Opportunity High.

Students at William Tell Aggeler Opportunity High are 88% Hispanic, 4% White, 3% African American, 3% Two or more races, 1% Asian.


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SchoolDigger data sources: National Center for Education Statistics, U.S. Department of Education, the U.S. Census Bureau and the California Department of Education.

IMPORTANT DISCLAIMERS: Not all boundaries are included. We make every effort to ensure that boundaries are up-to-date. But it's important to note that these are approximations and are for general informational purposes only. To verify legal descriptions of boundaries or school locations, contact your local tax assessor's office and/or school district.





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