Summary:
ZIP code 43821 contains exactly one high school — Tri-Valley High School in Dresden, Ohio — so families here have a single public high school option. It serves grades 8–12 with 730 students and belongs to the Tri-Valley Local district.
Academically, the school is generally strong compared with Ohio. In 2025–2026, its proficiency was above the state average in five of six End-of-Course subjects, including English II at 84.4% vs. 62.7% state, American History at 88.2% vs. 73.2%, and Biology at 83.3% vs. 67.0%. The clear exception is Geometry, the only subject below the state at 39.7% vs. 43.3% — and down from 46.9% the year before. English II posted the biggest one-year gain (up 16 points), while Geometry (down 7.2) and American Government (down 5.2) declined. Algebra I is consistently below the district's figure (67.0 vs. 72.6), the only subject where the school trails its district; since most other school and district scores are identical, that gap may reflect Algebra I takers outside this high school's reporting.
Beyond test scores, the graduation rate is a strength at 97.3%, matching the district. Chronic absenteeism is 14.6%, somewhat higher than the district's 12.5%. About 40.55% of students come from economically disadvantaged backgrounds based on free/reduced lunch, and the student/teacher ratio is 20.8. Per-student spending is listed at $8,685, but that figure dates to 2018–2019 and is too old to reflect current resourcing. In rankings, the school slipped from 4 stars / 74th percentile in 2023–2024 to 3 stars in the last two years (69th percentile in 2025–2026), while the district is currently rated 4 stars / 76th percentile.
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