High Schools in Corning Union High

The three high schools in Corning Union High serve grades 9–12 and enroll 1,070 students across the area. In 2025–2026, the district’s schools averaged 12% proficient in English language arts (ELA), 2% in math, and 9% in science, compared with statewide rates of 49%, 38%, and 36%, respectively. The most important finding is that even the strongest local school scored below the state in all three subjects.

Corning Union High leads the group in every tested subject: 35% were proficient in ELA, 7% in math, and 20% in science. The other two schools had 0% proficiency in ELA and math; in science, Centennial Continuation High had 8%, while Corning Independent Study had 0%. Corning Union High’s results were still 14 percentage points below the state in ELA, 32 points below in math, and 16 points below in science. Attendance and graduation also differ: Corning Union High reported 15% chronic absenteeism and 98% graduation, while Centennial reported 51% chronic absenteeism and 90% graduation. Centennial’s absenteeism is notably high compared with the state’s 18%.

Among the two schools with results in both years, average proficiency fell from 25% to 18% in ELA and from 8% to 3% in math between 2024–2025 and 2025–2026; science rose from 12% to 14%, while the state science rate increased by 3 points. SchoolDigger’s 2025–2026 rankings place Corning Union High at the 26th percentile, compared with the 0th percentile for both other schools; Corning Union High’s percentile was 41 in 2023–2024, so its latest position is lower. The schools’ reported free/reduced lunch eligible figures for 2024–2025 were 82% at Corning Union High, 84% at Centennial, and 69% at Independent Study—patterns that provide context, not an explanation for results. Student-teacher ratios were 17.9, 13.2, and 20.1, respectively; the lowest ratio is not at the test-score leader.