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Corning Union High

New rankings! California test scores for the 2025-26 school year were just released — SchoolDigger posted updated rankings this week.

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At a glance

946^thof 968 California districts▲ 394

Better than 2% of California districts

High 3Grades 9-12

643 Blackburn Ave.
Corning, CA 96021-2216·(530) 824-8000·All California district rankings →

Statewide performance 2018–2026

2026: better than 2.4% of districts

Schools

1,070

Students

Top rankedCorning Union High1584^th of 2,137 California high schools

✦

Newly ranked this year

Corning Independent Study

Compare California districts →See the top-ranked California schools →

Summary:

The three schools in the Corning Union High district serve grades 9–12: Corning Union High enrolls 974 students, Centennial Continuation High enrolls 67, and Corning Independent Study enrolls 29. The clearest area-wide concern is proficiency below state rates in every subject: the three-school average in 2025–2026 was 12% in English language arts, 2% in mathematics, and 9% in science, compared with state rates of 49%, 38%, and 36%. Those gaps were 38, 36, and 27 percentage points, respectively. Even the leading school was below the state in all three subjects.

Corning Union High is the academic standout, with 35% proficiency in English language arts, 7% in mathematics, and 20% in science; it led the next-highest school by 35, 7, and 12 percentage points. Corning Independent Study reported 0% in all three subjects, while Centennial Continuation High reported 0% in English language arts and mathematics and 8% in science. Attendance indicators also separate the schools: chronic absenteeism was 15% at Corning Union High, versus 51% at Centennial and 39% at Independent Study; the state rate was 18%. Corning Union High also had a 98% graduation rate, above the state’s 88%.

Recent test-score trends were mixed, but English language arts and mathematics declined at both schools with scores in both years. From 2024–2025 to 2025–2026, Corning Union High fell 7 points in English language arts and 9 in mathematics, while science rose 1 point. Centennial fell 9 points in English language arts, stayed at 0% in mathematics, and gained 4 points in science. SchoolDigger ranks Corning Union High at percentile 26 in 2025–2026, down from 41 in 2023–2024; both smaller schools are at percentile 0. Student-teacher ratios are 17.9 at Corning Union High, 13.2 at Centennial, and 20.1 at Independent Study. For 2024–2025, free/reduced lunch eligible rates were 82%, 84%, and 69%, respectively. Independent Study has no 2024–2025 test scores, so its results cannot be compared across the two years.

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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 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
Centennial Continuation High	Public	9-12	250 East Fig Ln.	Corning	96021	Tehama County	Corning Union High	No	(n/a)	No	(n/a)	(530) 824-7400	67	5	13.2	83.6%	19 (28.4%)	0 (0.0%)	43 (64.2%)	1 (1.5%)	2 (3.0%)	0 (0.0%)	1 (1.5%)	6.1	2134^th of 2137 public high schools	0.1%		9.3	2048^th of 2162 public high schools	5.3%	86	0.0		7.7	0.0	0.0	0.0	0.0	$32,195	$30,120	$2,075
Corning Union High	Public	9-12	643 Blackburn Ave.	Corning	96021	Tehama County	Corning Union High	No	(n/a)	No	(n/a)	(530) 824-8000	974	54	17.9	82.4%	234 (24.0%)	8 (0.8%)	669 (68.7%)	21 (2.2%)	6 (0.6%)	2 (0.2%)	33 (3.4%)	24.8	1584^th of 2137 public high schools	25.9%		35.5	1370^th of 2162 public high schools	36.6%	214	19.8		19.7	35.1	35.1	6.7	6.7	$32,946	$30,120	$2,826
Corning Independent Study	Public	9-12	250 East Fig Ln.	Corning	96021	Tehama County	Corning Union High	No	(n/a)	No	(n/a)	(530) 824-7400	29	1	20.1	69.0%	8 (27.6%)	0 (0.0%)	19 (65.5%)	0 (0.0%)	0 (0.0%)	0 (0.0%)	2 (6.9%)	6	2136^th of 2137 public high schools	0.0%					(n/a)	0.0		0.0	0.0	0.0	0.0	0.0	$32,195	$30,120	$2,075

Districts nearby

District	Distance	# of Schools	Statewide Rank
Corning Union Elementary	0.25 mi	6	899^th
Richfield Elementary	3.86 mi	1	452^nd
Kirkwood Elementary	4.44 mi	1	520^th
Los Molinos Unified	6.04 mi	3	480^th
Capay Joint Union Elementary	9.54 mi	1	445^th

See the top CA California districts

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.