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Dario Cassina High

Public Grades 10-12

1673^rd

SchoolDigger Rank ?

of 2,137 California High Schools

Better than 22% of California high schools

Summary

Dario Cassina High is a small high school in Sonora, California, serving grades 10–12, with 44 students reported. The latest figures show serious attendance and completion concerns: in 2025–2026, chronic absenteeism was 89%, compared with 36% in the Sonora Union High district and 18% statewide. Graduation was 77%, 15 points below the district, and the dropout rate was 10%, 7 points above it. The most pressing concern for families is the school’s very high chronic absenteeism.

Academically, English Language Arts is the school’s strongest subject relative to the district and state, while math and science are the weakest. In 2025–2026, 40% of students were proficient in ELA—9 points below the state and 15 below the district. In math, proficiency was 0%, 38 points below the state and 26 below the district; this tied with Vallecito Continuation High for the lowest nearby result. Science proficiency was 5%, 31 points below the state and the lowest among nearby schools with reported results. ELA is a relative bright spot, but performance remains low across all three subjects.

ELA has improved substantially, rising from 4% proficient in 2022–2023 to 40% in 2025–2026, while math remained at 0% in every reported year and science was 5% in the latest year. SchoolDigger’s overall ranking rose from the 4th percentile in 2022–2023 to the 22nd percentile in 2025–2026, with a current 1-star rating; it remains below the district’s 33rd percentile and 2 stars. SchoolDigger’s statewide effectiveness ranking for White students was notably lower, at the 5th percentile, versus the school’s overall 22nd percentile. The 2024–2025 student–teacher ratio was 14.1, below Sonora High (22.9) and Theodore Bird High (21.6). Also that year, 75% of students were eligible for free or reduced-price lunch, the highest reported share among nearby schools with the same measure; California provides free school meals statewide, which is useful context for interpreting that figure.

Students ?

14.1

Student/teacher ratio ?

$38,748

Per pupil spending ?

75.0%

Free/reduced lunch eligible (2024-25) ?

All students in California receive free school meals.

251 South Barretta St.
Sonora, CA 95370-5042

(209) 532-1587

District: Sonora Union High

Racial breakdown:

White:

68.2%

Hispanic:

20.5%

Two or more races:

9.1%

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Compare Dario Cassina High to nearby high schools!

At a glance

▲ Ranking trend: Improving — 12th percentile in 2016 → 22nd in 2026

Strengths

✓Ranking is trending up — up 10 percentile points since 2016

Worth a look

!Test scores below the California average (16% vs 42% meeting standards)

!In the lower quartile statewide (22nd percentile)

!Graduation rate below the California average (77% vs 88%)

Students meeting standards (2025-2026) ?

This school16%

District avg35%

California avg42%

1,673^rd of 2,137

California public high schools ?

Bottom 22%▲ up 9 pts since 2016

From bottom 12% (2016) to bottom 22% (2026)

See the entire ranking list of California High Schools →

★★★★★

SchoolDigger rating ?

3^rd of 3High Schools in the Sonora Union High

649^th of 968Sonora Union High 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)

Show full rank history (all student groups)

All Students

Year	Avg score	Statewide rank	California percentile	Rating
2026	18.9	1673 of 2137	21.7%	★☆☆☆☆
2025	15.6	1784 of 2162	17.5%	★☆☆☆☆
2024	10.4	2048 of 2159	5.1%	☆☆☆☆☆
2023	10.3	2075 of 2170	4.4%	☆☆☆☆☆
2022	12.0	1945 of 2123	8.4%	☆☆☆☆☆
2021	11.0	1145 of 1290	11.2%	★☆☆☆☆
2019	9.1	2096 of 2133	1.7%	☆☆☆☆☆
2018	15.8	1585 of 2017	21.4%	★☆☆☆☆
2017	10.3	1812 of 2021	10.3%	★☆☆☆☆
2016	11.2	1786 of 2039	12.4%	★☆☆☆☆
2015	11.3	1731 of 1994	13.2%	★☆☆☆☆
2013	20.0	1647 of 2426	32.1%	★★☆☆☆
2012	15.7	1787 of 2354	24.1%	★☆☆☆☆
2011	34.8	1181 of 2367	50.1%	★★★☆☆
2010	29.6	1285 of 2281	43.7%	★★☆☆☆
2009	39.1	1053 of 2238	52.9%	★★★☆☆
2008	21.1	1496 of 2117	29.3%	★☆☆☆☆
2007	13.8	1768 of 2063	14.3%	★☆☆☆☆
2006	23.8	1286 of 1968	34.7%	★★☆☆☆
2005	31.8	1001 of 1901	47.3%	★★☆☆☆
2004	42.8	644 of 1653	61.0%	★★★☆☆

Female

Year	Avg score	Statewide rank	California percentile	Rating
2026	12.5	1630 of 1865	12.6%	★☆☆☆☆
2022	7.5	1851 of 1858	0.4%	☆☆☆☆☆

Hispanic

Year	Avg score	Statewide rank	California percentile	Rating
2023	8.6	1887 of 1917	1.6%	☆☆☆☆☆

Low Socio Economic Status

Year	Avg score	Statewide rank	California percentile	Rating
2026	18.2	1604 of 1999	19.8%	★☆☆☆☆
2025	17.5	1631 of 2013	19.0%	★☆☆☆☆
2024	10.1	1946 of 2026	3.9%	☆☆☆☆☆
2023	9.3	1998 of 2030	1.6%	☆☆☆☆☆
2022	13.3	1734 of 1943	10.8%	★☆☆☆☆
2021	12.1	986 of 1126	12.4%	★☆☆☆☆
2019	9.8	1879 of 1937	3.0%	☆☆☆☆☆

Male

Year	Avg score	Statewide rank	California percentile	Rating
2025	14.7	1625 of 1942	16.3%	★☆☆☆☆
2024	11.0	1797 of 1948	7.8%	☆☆☆☆☆
2023	10.9	1831 of 1963	6.7%	☆☆☆☆☆
2022	13.8	1676 of 1916	12.5%	★☆☆☆☆
2021	13.6	969 of 1122	13.6%	★☆☆☆☆
2019	9.1	1833 of 1880	2.5%	☆☆☆☆☆
2018	8.9	1773 of 1834	3.3%	☆☆☆☆☆

White

Year	Avg score	Statewide rank	California percentile	Rating
2026	4.1	1073 of 1132	5.2%	☆☆☆☆☆
2025	3.6	1119 of 1155	3.1%	☆☆☆☆☆
2024	2.6	1167 of 1173	0.5%	☆☆☆☆☆
2023	3.8	1165 of 1193	2.3%	☆☆☆☆☆
2022	4.8	1162 of 1204	3.5%	☆☆☆☆☆
2019	3.3	1210 of 1222	1.0%	☆☆☆☆☆
2018	6.4	1073 of 1173	8.5%	☆☆☆☆☆

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)

Low Socio Economic Status (2026)20th percentile~ school

Male (2025)16th percentile~ school

Female (2026)13th percentile-9 vs school

White (2026)5th percentile-17 vs school

Hispanic (2023)2nd percentile-3 vs school

By subject vs California (2025-2026) ?

English Language Arts/Literacy40%-9 vs state

Science5%-31 vs state

Mathematics0%-38 vs state

★

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Schools Near Dario Cassina High

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Ranking:

E Elementary M Middle H High A Alternative P Private

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

School													Students/Teachers											Ranking (2026)				Ranking (2025)				CAST Science (2026)				Smarter Balanced Assessments English Language Arts/Literacy (2026)				Smarter Balanced Assessments Mathematics (2026)				Per Pupil Expenditures (2025)
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/reduced lunch (2024-25)	White	Black	Hispanic	Asian	American Indian	Pacific Islander	Two or More Races	Average Standard Score (2026)	Statewide Rank (2026)	State Percentile (2026)	SchoolDigger Rating (2026)	Average Standard Score (2025)	Statewide Rank (2025)	State Percentile (2025)	Rank Change from Previous Year	CAST Science 8th Grade	CAST Science 11th Grade	CAST Science 12th Grade	CAST Science All Grades	Smarter Balanced Assessments English Language Arts/Literacy 7th Grade	Smarter Balanced Assessments English Language Arts/Literacy 8th Grade	Smarter Balanced Assessments English Language Arts/Literacy 11th Grade	Smarter Balanced Assessments English Language Arts/Literacy All Grades	Smarter Balanced Assessments Mathematics 7th Grade	Smarter Balanced Assessments Mathematics 8th Grade	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
Dario Cassina High	Public	10-12	251 South Barretta St.	Sonora	95370	Tuolumne County	Sonora Union High	No	(n/a)	No	(n/a)	(209) 532-1587	44	3	14.1	75.0%	30 (68.2%)	0 (0.0%)	9 (20.5%)	0 (0.0%)	0 (0.0%)	0 (0.0%)	4 (9.1%)	18.9	1673^rd of 2137 public high schools	21.7%		15.6	1784^th of 2162 public high schools	17.5%	111		5.0		5.0			40.0	40.0			0.0	0.0	$38,748	$32,590	$6,158
Theodore Bird High	Public	9-12	251 South Barretta St.	Sonora	95370	Tuolumne County	Sonora Union High	No	(n/a)	No	(n/a)	(209) 533-2923	65	3	21.6	56.9%	49 (75.4%)	0 (0.0%)	8 (12.3%)	0 (0.0%)	1 (1.5%)	1 (1.5%)	3 (4.6%)	29.6	1487^th of 2137 public high schools	30.4%		16.3	1762^nd of 2162 public high schools	18.5%	275		21.7		21.7			40.9	40.9			8.7	8.7	$12,831	$11,734	$1,097
Sonora High	Public	9-12	430 North Washington St.	Sonora	95370	Tuolumne County	Sonora Union High	No	(n/a)	No	(n/a)	(209) 532-5511	880	38	22.9	38.3%	542 (61.6%)	9 (1.0%)	206 (23.4%)	18 (2.0%)	15 (1.7%)	1 (0.1%)	85 (9.7%)	56.2	895^th of 2137 public high schools	58.1%		67.9	638^th of 2162 public high schools	70.5%	257		26.8		26.5			59.2	59.2			31.0	31.0	$22,188	$21,924	$264
Summerville High	Public	9-12	17555 Tuolumne Rd.	Tuolumne	95379	Tuolumne County	Summerville Union High	No	(n/a)	No	(n/a)	(209) 928-4228	508	22	23.1	45.5%	334 (65.7%)	1 (0.2%)	113 (22.2%)	1 (0.2%)	10 (2.0%)	0 (0.0%)	48 (9.4%)	60.6	804^th of 2137 public high schools	62.4%		63.5	728^th of 2162 public high schools	66.3%	76		34.2		33.6			65.5	65.5			25.7	25.7	$33,043	$32,758	$285
Connections Visual and Performing Arts Academy	Public, Charter	7-12	17555 Tuolumne Rd.	Tuolumne	95379	Tuolumne County	Summerville Union High	Yes	(n/a)	No	(n/a)	(209) 928-4228	117	6	19.9	30.8%	76 (65.0%)	1 (0.9%)	26 (22.2%)	2 (1.7%)	1 (0.9%)	0 (0.0%)	11 (9.4%)	79.5	418^th of 2137 public high schools	80.4%		84.8	318^th of 2162 public high schools	85.3%	100	72.7	41.2		53.6		81.8	82.4	82.9		72.7	41.2	48.6	$22,952	$22,952	$00
Bret Harte Union High	Public	9-12	364 Murphys Grade Rd.	Angels Camp	95221	Calaveras County	Bret Harte Union High	No	(n/a)	No	(n/a)	(209) 736-2507	559	33	17.0	41.5%	365 (65.3%)	2 (0.4%)	137 (24.5%)	2 (0.4%)	6 (1.1%)	0 (0.0%)	47 (8.4%)	44.3	1160^th of 2137 public high schools	45.7%		60.4	812^th of 2162 public high schools	62.4%	348		32.4		32.4			49.1	49.1			15.0	15.0	$42,137	$41,574	$563
Vallecito Continuation High	Public	9-12	364 Murphys Grade Rd.	Altaville	95221	Calaveras County	Bret Harte Union High	No	(n/a)	No	(n/a)	(209) 736-2507	43	2	21.7	55.8%	25 (58.1%)	0 (0.0%)	14 (32.6%)	0 (0.0%)	2 (4.7%)	0 (0.0%)	2 (4.7%)	11.3	1876^th of 2137 public high schools	12.2%		13.8	1846^th of 2162 public high schools	14.6%	30		9.1		9.1			18.2	18.2			0.0	0.0	$21,486	$19,602	$1,884
Tioga High	Public	9-12	19304 Ferretti Rd.	Groveland	95321	Tuolumne County	Big Oak Flat-Groveland Unified	No	(n/a)	No	(n/a)	(209) 962-4763	49	6	8.2	49.0%	41 (83.7%)	1 (2.0%)	3 (6.1%)	0 (0.0%)	2 (4.1%)	1 (2.0%)	1 (2.0%)	16	1733^rd of 2137 public high schools	18.9%					(n/a)		11.8		11.8			23.5	23.5			5.9	5.9	$52,689	$50,176	$2,513
South Fork High	Public	9-12	25611 Lyons Dam Rd.	Twain Harte	95379	Tuolumne County	Summerville Union High	No	(n/a)	No	(n/a)	(209) 586-5672	4	2	1.9	—	2 (50.0%)	0 (0.0%)	1 (25.0%)	0 (0.0%)	0 (0.0%)	0 (0.0%)	1 (25.0%)								(n/a)
Cold Springs High	Public	9-12	25910 Long Barn Rd.	Long Barn	95379	Tuolumne County	Summerville Union High	No	(n/a)	No	(n/a)	(209) 586-3011	2	2	.9	—	2 (100.0%)	0 (0.0%)	0 (0.0%)	0 (0.0%)	0 (0.0%)	0 (0.0%)	0 (0.0%)								(n/a)

Frequently Asked Questions about Dario Cassina High

How many students attend Dario Cassina High?

In the 2024-25 school year, 44 students attended Dario Cassina High.

What district is Dario Cassina High in?

Sonora Union High

Is Dario Cassina High a good school?

Dario Cassina High ranks in the bottom 21.7% of California high schools.

What is the racial makeup of Dario Cassina High?

Students at Dario Cassina High are 68% White, 20% Hispanic, 9% Two or more races, 2% Not Specified.

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Latest California data All new data »

2025–26 attendance data, dropout rates & graduation ratesNewOct 15, 2026

2025–26 CAST, CSA Spanish & Smarter Balanced Assessments scoresNewOct 15, 2026

2024–25 school spending dataJul 1, 2026

2024–25 attendance dataMar 13, 2026

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.