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William Tell Aggeler Opportunity High

Q: Is William Tell Aggeler Opportunity High a good school?

William Tell Aggeler Opportunity High ranks in the bottom 0.2% of California high schools.

Q: How many students attend William Tell Aggeler Opportunity High?

In the 2024-25 school year, 61 students attended William Tell Aggeler Opportunity High.

Q: What is the racial makeup of William Tell Aggeler Opportunity High?

Students at William Tell Aggeler Opportunity High are 89% Hispanic, 3% White, 3% African American, 3% Two or more races, 2% Asian.

Public Grades 7-12

2158^th

SchoolDigger Rank ?

of 2,162 California High Schools

Better than 0% of California high schools

Summary

William Tell Aggeler Opportunity High is a very small, alternative public high school in Chatsworth, California, serving grades 7-12 with only about 61 students as part of the Los Angeles Unified school district.

This school serves a specific and critical role as an "opportunity" school for students who have faced significant challenges in traditional settings, which is reflected in its performance data. It consistently ranks among the lowest in the state, with 0% of students testing proficient in core subjects, a chronic absenteeism rate over 75%, and highly variable graduation rates. Despite receiving very high funding per student and having a low student-to-teacher ratio, these substantial resources have not translated into improved academic outcomes over the past decade, highlighting the profound difficulties its students face.

The school's situation becomes especially clear when compared to others nearby. For instance, Chatsworth Charter High, less than a mile away, has graduation rates above 90% and far lower absenteeism. While other alternative schools like John R. Wooden High or Owensmouth Continuation also face significant challenges, William Tell Aggeler's performance metrics are at the absolute bottom, underscoring its role as a last-resort safety net within the local educational system.

Students ?

10.0

Student/teacher ratio ?

$45,205

Per pupil spending ?

95.1%

Free/discounted lunch ?

21050 Plummer St.
Chatsworth, CA 91311-4903

(818) 341-1232

District: Los Angeles Unified

Racial breakdown:

Hispanic:

88.5%

White:

3.3%

African American:

3.3%

See top rated California high schools

Compare William Tell Aggeler Opportunity High to nearby high schools!

At a glance

▼ Ranking trend: Declining — 39th percentile in 2011 → <1st in 2025

Strengths

✓Small classes — about 10 students per teacher

Worth a look

!Test scores below the California average (0% vs 41% meeting standards)

!In the lower quartile statewide (<1st percentile)

!Graduation rate below the California average (50% vs 88%)

Students meeting standards (2024-2025) ?

This school0%

District avg39%

California avg41%

2,158^th of 2,162

California public high schools ?

Bottom 1%▼ down 8 pts since 2016

From bottom 8% (2016) to bottom 1% (2025)

See the entire ranking list of California High Schools →

★★★★★

SchoolDigger rating ?

153^rd of 153High Schools in the Los Angeles Unified

791^st of 1,543Los Angeles Unified among California districts

Statewide rank percentile over time (100 = the top-ranked school in the state; click a legend item to add a student group)

Middle school ranking

Show full rank history (all student groups)

All Students

Year	Avg score	Statewide rank	California percentile	Rating
2019	4.6	2693 of 2715	0.8%	☆☆☆☆☆
2016	2.6	2495 of 2497	0.1%	☆☆☆☆☆
2015	2.9	2473 of 2477	0.2%	☆☆☆☆☆
2008	8.4	1903 of 2005	5.1%	☆☆☆☆☆

Hispanic

Year	Avg score	Statewide rank	California percentile	Rating
2019	4.3	2201 of 2213	0.5%	☆☆☆☆☆

Low Socio Economic Status

Year	Avg score	Statewide rank	California percentile	Rating
2019	4.5	2355 of 2369	0.6%	☆☆☆☆☆

Male

Year	Avg score	Statewide rank	California percentile	Rating
2019	4.7	2395 of 2407	0.5%	☆☆☆☆☆

High school ranking

Show full rank history (all student groups)

All Students

Year	Avg score	Statewide rank	California percentile	Rating
2025	6.9	2158 of 2162	0.2%	☆☆☆☆☆
2024	8.2	2151 of 2159	0.4%	☆☆☆☆☆
2023	9.3	2127 of 2170	2.0%	☆☆☆☆☆
2019	9.7	2068 of 2133	3.0%	☆☆☆☆☆
2018	8.9	1965 of 2017	2.6%	☆☆☆☆☆
2017	11.9	1711 of 2021	15.3%	★☆☆☆☆
2016	9.8	1881 of 2039	7.7%	☆☆☆☆☆
2013	21.1	1602 of 2426	34.0%	★★☆☆☆
2012	14.5	1830 of 2354	22.3%	★☆☆☆☆
2011	25.3	1455 of 2367	38.5%	★★☆☆☆
2010	31.0	1253 of 2281	45.1%	★★☆☆☆
2009	13.3	1953 of 2238	12.7%	★☆☆☆☆
2008	8.5	1912 of 2117	9.7%	☆☆☆☆☆
2007	8.0	1895 of 2063	8.1%	☆☆☆☆☆
2006	8.2	1793 of 1968	8.9%	☆☆☆☆☆
2005	7.5	1745 of 1901	8.2%	☆☆☆☆☆

Hispanic

Year	Avg score	Statewide rank	California percentile	Rating
2025	6.6	1899 of 1900	0.1%	☆☆☆☆☆
2024	7.7	1895 of 1902	0.4%	☆☆☆☆☆
2023	9.2	1873 of 1917	2.3%	☆☆☆☆☆
2019	8.1	1799 of 1814	0.8%	☆☆☆☆☆
2018	8.7	1684 of 1742	3.3%	☆☆☆☆☆

Low Socio Economic Status

Year	Avg score	Statewide rank	California percentile	Rating
2025	6.9	2013 of 2013	0.0%	☆☆☆☆☆
2024	8.3	2014 of 2026	0.6%	☆☆☆☆☆
2023	9.9	1973 of 2030	2.8%	☆☆☆☆☆
2019	8.7	1926 of 1937	0.6%	☆☆☆☆☆
2018	9.3	1802 of 1862	3.2%	☆☆☆☆☆

Male

Year	Avg score	Statewide rank	California percentile	Rating
2024	8.1	1939 of 1948	0.5%	☆☆☆☆☆
2023	8.7	1929 of 1963	1.7%	☆☆☆☆☆

How student groups rank statewide ? (each group's percentile vs the same group at other schools — higher is better; the +/- beside each compares the group with this school's overall percentile)

Middle school

Low Socio Economic Status (2019)1st percentile~ school

Hispanic (2019)1st percentile~ school

Male (2019)<1st percentile~ school

High school

Male (2024)<1st percentile~ school

Hispanic (2025)<1st percentile~ school

Low Socio Economic Status (2025)<1st percentile~ school

By subject vs California (2024-2025) ?

English Language Arts/Literacy0%-49 vs state

Mathematics0%-37 vs state

Science0%-33 vs state

★

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Schools Near William Tell Aggeler Opportunity High

Choose columns to see: Summary School Students/Teachers Ranking Test Scores Finance All

School													Students/Teachers											Ranking (2025)				Ranking (2024)				CAST Science (2025)				Smarter Balanced Assessments English Language Arts/Literacy (2025)		Smarter Balanced Assessments Mathematics (2025)		Per Pupil Expenditures (2024)
Name	Type	Grades	Address	City	Zip	County	District	Is Charter	Is Magnet	Is Virtual	Is Title I	Phone	Enrollment	Full-time Teachers	Student/ Teacher Ratio	Free/Discounted Lunch Recipients	White	Black	Hispanic	Asian	American Indian	Pacific Islander	Two or More Races	Average Standard Score (2025)	Statewide Rank (2025)	State Percentile (2025)	SchoolDigger Rating (2025)	Average Standard Score (2024)	Statewide Rank (2024)	State Percentile (2024)	Rank Change from Previous Year	CAST Science 10th Grade	CAST Science 11th Grade	CAST Science 12th Grade	CAST Science All Grades	Smarter Balanced Assessments English Language Arts/Literacy 11th Grade	Smarter Balanced Assessments English Language Arts/Literacy All Grades	Smarter Balanced Assessments Mathematics 11th Grade	Smarter Balanced Assessments Mathematics All Grades	Per Pupil Expenditures Total	Sub-total from Federal Funds	Sub-total from State/Local Funds
William Tell Aggeler Opportunity High	Public	7-12	21050 Plummer St.	Chatsworth	91311	Los Angeles County	Los Angeles Unified	No	(n/a)	No	(n/a)	(818) 341-1232	61	6	10.0	95.1%	2 (3.3%)	2 (3.3%)	54 (88.5%)	1 (1.6%)	0 (0.0%)	0 (0.0%)	2 (3.3%)	6.9	2158^th of 2162 public high schools	0.2%		8.2	2151^st of 2159 public high schools	0.4%	7				0.0	0.0	0.0	0.0	0.0	$45,205	$4,591	$40,614
Aggeler Community Day	Public	7-12	21050 Plummer St.	Chatsworth	91311	Los Angeles County	Los Angeles Unified	No	(n/a)	No	(n/a)	(818) 341-1232	23	3	9.0	87.0%	0 (0.0%)	3 (13.0%)	19 (82.6%)	0 (0.0%)	0 (0.0%)	0 (0.0%)	1 (4.3%)								(n/a)									$102,394	$20,724	$81,670
Stoney Point Continuation	Public	9-12	10010 de Soto Ave.	Chatsworth	91311	Los Angeles County	Los Angeles Unified	No	(n/a)	No	(n/a)	(818) 678-3491	105	9	11.5	94.3%	12 (11.4%)	3 (2.9%)	84 (80.0%)	3 (2.9%)	0 (0.0%)	0 (0.0%)	3 (2.9%)	15.7	1778^th of 2162 public high schools	17.8%		14.5	1834^th of 2159 public high schools	15.1%	56	5.9	7.1	12.5	7.7	12.5	12.5	6.1	6.1	$25,378	$5,380	$19,998
Chatsworth Charter High	Public, Charter	9-12	10027 Lurline Ave.	Chatsworth	91311	Los Angeles County	Los Angeles Unified	Yes	(n/a)	No	(n/a)	(818) 678-3400	1,743	82	21.2	68.9%	264 (15.1%)	85 (4.9%)	1,049 (60.2%)	263 (15.1%)	2 (0.1%)	6 (0.3%)	73 (4.2%)	57.4	885^th of 2162 public high schools	59.1%		61.6	725^th of 2159 public high schools	66.4%	160		26.9	30.8	27.0	50.5	50.5	33.6	33.6	$19,006	$3,117	$15,889
Joaquin Miller Career and Transition Center	Public	12	8218 Vanalden Ave.	Reseda	91335	Los Angeles County	Los Angeles Unified	No	(n/a)	No	(n/a)	(818) 885-1646	164	18	9.2	79.3%	32 (19.5%)	7 (4.3%)	112 (68.3%)	10 (6.1%)	0 (0.0%)	0 (0.0%)	3 (1.8%)								(n/a)									$92,470	$10,594	$81,876
Grover Cleveland Charter High	Public, Charter	9-12	8140 Vanalden Ave.	Reseda	91335	Los Angeles County	Los Angeles Unified	Yes	(n/a)	No	(n/a)	(818) 885-2300	2,719	120	22.5	71.5%	454 (16.7%)	83 (3.1%)	1,734 (63.8%)	302 (11.1%)	2 (0.1%)	3 (0.1%)	141 (5.2%)	75.6	485^th of 2162 public high schools	77.6%		76.8	461^st of 2159 public high schools	78.6%	24		39.8	7.1	37.7	65.4	65.4	40.5	40.5	$18,179	$3,405	$14,774
Valley International Preparatory High	Public, Charter	9-12	18827 Roscoe Blvd.	Northridge	91324	Los Angeles County	Valley International Preparatory High District	Yes	(n/a)	No	(n/a)	(818) 306-2136	259	18	14.3	31.7%	125 (48.3%)	11 (4.2%)	85 (32.8%)	9 (3.5%)	0 (0.0%)	0 (0.0%)	23 (8.9%)	87.9	248^th of 2162 public high schools	88.5%		85.4	319^th of 2159 public high schools	85.2%	71			33.3	33.3	83.9	83.9	46.4	46.4	$16,149	$388	$15,761
Owensmouth Continuation	Public	9-12	6921 Jordan Ave.	Canoga Park	91303	Los Angeles County	Los Angeles Unified	No	(n/a)	No	(n/a)	(818) 340-7663	79	5	15.6	94.9%	2 (2.5%)	0 (0.0%)	73 (92.4%)	2 (2.5%)	0 (0.0%)	0 (0.0%)	2 (2.5%)	11.4	1944^th of 2162 public high schools	10.1%		12.2	1933^rd of 2159 public high schools	10.5%	11		4.4	0.0	2.4	17.9	17.9	0.0	0.0	$39,914	$7,317	$32,597
Canoga Park Senior High	Public	9-12	6850 Topanga Canyon Blvd.	Canoga Park	91303	Los Angeles County	Los Angeles Unified	No	(n/a)	No	(n/a)	(818) 673-1300	1,389	79	17.5	92.4%	88 (6.3%)	36 (2.6%)	1,202 (86.5%)	48 (3.5%)	1 (0.1%)	0 (0.0%)	14 (1.0%)	47	1098^th of 2162 public high schools	49.2%		40.7	1229^th of 2159 public high schools	43.1%	131		22.1	0.0	21.0	52.5	52.5	22.2	22.2	$21,265	$4,281	$16,984
John R. Wooden High	Public	9-12	18741 Elkwood St.	Reseda	91335	Los Angeles County	Los Angeles Unified	No	(n/a)	No	(n/a)	(818) 345-0203	91	5	16.7	98.9%	1 (1.1%)	3 (3.3%)	85 (93.4%)	1 (1.1%)	0 (0.0%)	0 (0.0%)	1 (1.1%)	11.6	1935^th of 2162 public high schools	10.5%		18.9	1721^st of 2159 public high schools	20.3%	214		5.6	0.0	3.3	17.9	17.9	0.0	0.0	$26,392	$5,754	$20,638

Frequently Asked Questions about William Tell Aggeler Opportunity High

How many students attend William Tell Aggeler Opportunity High?

In the 2024-25 school year, 61 students attended William Tell Aggeler Opportunity High.

What district is William Tell Aggeler Opportunity High in?

Los Angeles Unified

What is the racial makeup of William Tell Aggeler Opportunity High?

Students at William Tell Aggeler Opportunity High are 89% Hispanic, 3% White, 3% African American, 3% Two or more races, 2% Asian.

Is William Tell Aggeler Opportunity High a good school?

William Tell Aggeler Opportunity High ranks in the bottom 0.2% of California high schools.

Rate William Tell Aggeler Opportunity High!

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Schools in Chatsworth, CA

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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.