Summary:
High Schools located in Southwest School Corporation include one school, Sullivan High School, serving grades 9–12 with 528 students in Sullivan, Indiana. Because it is the only high school in this area summary, parents should compare it mainly with Indiana state averages and with its own prior years rather than with other local high schools. About 49.43% of students receive free or reduced lunch, per-student spending is $12,989, and the student-teacher ratio is 13.3.
The school’s clearest strengths are completion and attendance. Its 2024–2025 graduation rate is 94.1%, matching the district and well above Indiana’s 89.7%, while chronic absenteeism is 11.2%, lower than the district’s 12.5% and much lower than the state’s 16.7%. In academics, SAT Evidence-based Reading and Writing is a relative bright spot: 56.76% proficient in 2025–2026, above Indiana’s 51.9%, and 57.35% in 2024–2025, above the state’s 54.5%. The school also reached a high point in 2024–2025, ranking 105 out of 429 schools, the 76th percentile with 4 stars.
Concerns are concentrated in math and biology. SAT Mathematics fell from 25.74% in 2024–2025 to 18.92% in 2025–2026; it was near the state’s 25.4% before but is now well below the state’s 25.6%. Biology ILEARN slipped from 49.32% to 45.57%, and the district scored higher in both years, 58.41% and 55.08%. Rank also softened after the peak: 146 out of 415, the 65th percentile with 3 stars in 2025–2026, still above 2023–2024’s 45th percentile and 2 stars. The district is listed at 227 of 374, the 39th percentile with 2 stars, which may reflect a different ranking scope. Overall, the school shows strong graduation, attendance, and reading/writing results, but recent math and biology results need attention.
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