Summary:
Winnebago High School is the only high school listed in Winnebago CUSD 323, serving grades 9–12 and enrolling 422 students. The clearest strength is its grade 9 mathematics result: 55% of students were proficient in 2025–2026, compared with 42% statewide, a 13-point advantage.
There is no second school in this list to rank above or below it, but Winnebago High School exceeded state results in seven of nine matched subject and grade comparisons, averaging 4 points above the state. Grade 9 was strongest: ELA proficiency was 69% versus 62% statewide, and science was 54% versus 47%. Across the three grade-and-test comparisons, mathematics had the largest average advantage, at 6 points; ELA and science averaged 3 points above the state. Grade 10 results were close to state levels, with ELA and science slightly below. Other outcomes are mixed: chronic absenteeism was 13%, below the state’s 24%, while graduation was 83% versus 90% statewide and dropout was 3% versus 2%.
Results changed unevenly between 2024–2025 and 2025–2026: grade 9 math rose 16 points, compared with a 4-point state increase, while grade 11 ACT ELA fell 10 points and grade 10 math fell 3 points. Across all nine comparisons, the school’s average rose about 1 point, while the state average was nearly unchanged; the school’s average advantage grew from about 2 to 4 points. SchoolDigger ranks the school 184th of 620 statewide, at the 70th percentile with four stars. Context figures include a 12.1 student–teacher ratio in 2024–2025 and 27% free/reduced lunch eligible that year; these describe the school but do not establish what explains its results.
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