Summary:
Hillsboro-Deering High School is the only high school in the Hillsboro-Deering Cooperative School District, serving grades 9–12 and 334 students in Hillsborough, New Hampshire. Its small enrollment and 9.4-to-1 student-teacher ratio may support more individualized attention, although small class sizes can vary by course. Because it is the district’s only high school, its results provide a direct picture of high-school performance in the area.
The school’s overall standing improved substantially, rising from 44th of 86 schools in 2024–2025 to 29th of 89 in 2025–2026. That moved it from about the 49th percentile to the 67th percentile. Academically, reading and science are the clearest strengths. In 2025–2026, 60% of students were proficient in reading, compared with 56% across the district and 55% statewide. Science proficiency was 56%, well above the district’s 43% and the state’s 38%. Grade 11 science performance was also strong at 56%, exceeding the statewide result by 16 percentage points.
Mathematics is the most important area for improvement. Only 19% of students were proficient in the all-grade mathematics measure, compared with 39% in the district and 44% statewide; grade 11 SAT mathematics proficiency was also 19%, versus 30% statewide. Results did improve modestly from the prior year in every subject, including a three-point gain in mathematics. The graduation rate was 82.5% in 2024–2025, below the state’s 87.0%, while the dropout rate was close to the state average at 2.5% versus 2.3%. Overall, families should see a school with encouraging recent momentum and strong reading and science outcomes, but with uneven performance and a clear need to strengthen mathematics and graduation outcomes.
Thank you for your feedback!