Summary
South Middle School in suburban Arlington Heights, Illinois, serves grades 6–8 and enrolls 812 students. Its clearest strength is eighth-grade science: in 2025–26, 82% of students were proficient, compared with 52% statewide and 80% in Arlington Heights School District 25. South also outperformed every nearby school in eighth-grade science, making this its most distinctive result.
South’s results are stronger than the state’s overall, but its local and district comparisons vary by subject. All-grades ELA proficiency was 76%, about 20 points above the state and 1 point above the district; South ranked fifth among the 11 nearby schools. Math was 56%, 16 points above the state but 7 points below the district, and tied for fifth–sixth locally. Nearby-school averages were 64% in ELA and 47% in math, so South was above both, though several peers matched or exceeded its scores. Grade-level results show more detail: sixth-grade ELA was 69%, below the district’s 72% and four nearby schools, while seventh-grade ELA was 83%, second among nearby schools. Eighth-grade math was 52%, above the district’s 49% and second locally.
Scores rose from 2023–24 to 2025–26: ELA increased from 72% to 76%, and math from 48% to 56%, though South’s advantage over the state narrowed in both subjects. Attendance is another positive: chronic absenteeism fell from 13% in 2021–22 to 7% in 2025–26, the lowest rate among nearby schools. SchoolDigger rates South at the 83rd statewide percentile, with 4 stars and a rank of 189 out of 1,126; its percentile has declined from 91 over three reported years. South’s student-teacher ratio is 12:1, near the nearby-school average of 12.3:1. In 2024–25, 16% of students were free/reduced lunch eligible, the second-lowest rate among nine nearby schools with that measure. SchoolDigger’s statewide rankings for how well South serves student groups are notably lower than its overall ranking: 42nd percentile for Asian students and 27th for special education students, versus 83rd overall; the ranking pools change across years, so subgroup trends warrant caution.
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