Summary:
High schools in zip code 60424 are represented by one school, Gardner-South Wilmington Township High School, serving grades 9–12. Its 2025–2026 results show a mixed academic picture, alongside strong reported graduation and attendance measures. The clearest academic finding is that math was above state results overall, while ELA and science were below.
Because only one school is listed, there is no meaningful within-area top-or-bottom comparison. The school’s three math results averaged about 45% proficient, compared with 39% for the matching state results; it was above the state in all three math comparisons, including grade 9 math (53% versus 42%). Its ELA average was 47% versus 55% statewide, and its science average was 40% versus 48%. The reported 2025–2026 graduation rate was 100%, compared with 90% statewide, while chronic absenteeism was 18% versus 24% statewide.
Results changed unevenly between 2024–2025 and 2025–2026: grade 9 PreACT ELA rose 8 percentage points and grade 9 math rose 15 points, while grade 11 ACT science fell 14 points and grade 10 PreACT ELA and science each fell 13 points. Across nine matched comparisons, the school’s average gap with the state shifted 3 points farther below; that overall pattern coexists with the grade 9 gains. SchoolDigger listed the school at rank 310 of 620, the 50th percentile, and 3 stars in 2025–2026; its percentile was 61 in 2023–2024 and 67 in 2024–2025. Context measures include 154 students, a student-teacher ratio of 8.5 in 2024–2025, and 30% free/reduced lunch eligible in 2024–2025.
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