Summary:
The Kasson-Mantorville School District in Minnesota is home to a single high school, Kasson-Mantorville Senior High, which serves grades 9–12 and enrolls 671 students in Kasson, MN. Because it is the district's only high school, its performance also defines the district's high-school profile, and several district-level metrics match the school exactly.
The school is a consistent high performer. The district ranks 24th of 458 Minnesota districts (95th percentile) with 5 stars, and the high school itself has earned 5 stars in every reported year. Its state ranking among high schools was 33rd of 480 (93rd percentile) in 2023–2024, 15th of 450 (97th percentile) in 2024–2025, and 37th of 473 (92nd percentile) in 2025–2026. Graduation and dropout outcomes are a major strength: a 96.7% graduation rate versus 84.9% statewide, and a 0.6% dropout rate versus 4.2% statewide. Science is the strongest relative advantage — 45.6% proficiency in 2025–2026 versus 25.5% statewide, and 52.74% versus 26.15% in 2024–2025. Math (52.8% vs. 44.9% state) and reading (59.6% vs. 48.6% state) also beat state averages.
The main watch item is reading, which fell from 72.11% in 2024–2025 to 59.6% in 2025–2026, while science slipped 7.14 points and math held steady. Note that the 2025–2026 reading exam is labeled MCA-IV and the prior year's MCA-III, so that year-over-year comparison may not be perfectly equivalent. Reading still remains 11.0 points above the state and slightly above the district. In math, the all-grade district figure (57.1%) sits above the school's 52.8%, but at 11th grade the school and district are both at 52.8%, well above the state's 35.3% — suggesting the district number aggregates other grades rather than reflecting a weakness in the high school. Contextually, the school reports 20.12% free/reduced lunch and a 17.2 student-teacher ratio.
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