Summary:
Mahomet-Seymour CUSD 3 has one high school, Mahomet-Seymour High School, serving grades 9–12 in the Mahomet-Seymour area, with 1,050 students. In 2025–26, the school’s graduation rate was 95%, compared with 90% statewide, and chronic absenteeism was 16%, below the state’s 24% but above the district’s 10%. The most important finding is that the school scored above the state in all nine reported subject-and-grade comparisons.
Because it is the only high school in the list, Mahomet-Seymour High School cannot be identified as a local leader or trailer. Its strongest relative subject was mathematics: the average school-state advantage was 28 points, compared with 22 in science and 19 in ELA. The largest individual margin was 33 points in grade 10 math, while the smallest was 16 points in grade 9 ELA. Results ranged from 64% in grade 9 science to 78% in grade 9 ELA. SchoolDigger rated the school five stars and ranked it 43rd of 620 schools statewide, in the 93rd percentile, for 2025–26.
Results improved only modestly on average, and changes varied by grade and subject. Across the same nine test comparisons, the school’s average rose from 69.7% in 2024–25 to 70.2% in 2025–26, while the state average moved from 47.8% to 47.4%; the average gap widened from 22 to 23 points. Grade 10 science rose 10 points, but grade 9 science fell 4 points. SchoolDigger’s percentile also edged down over three years, from the 95th percentile in 2023–24 to the 94th in 2024–25 and 93rd in 2025–26, despite a one-place improvement in rank from the prior year. For context, the school’s student-teacher ratio was 16.5 in 2024–25, and 23% of students were free/reduced lunch eligible that school year. These figures describe one school and do not support comparisons among local schools.
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