Summary:
60426 has one high school, Thornton Township High School, serving grades 9–12 and enrolling 1,697 students in 2024–2025; families are looking at one campus rather than choosing among local high schools. The clearest concern is that proficiency was below state levels in every reported subject and grade in 2025–2026: across nine results, the school averaged 18% proficient, compared with 47% statewide, a 29-point gap.
There is no meaningful top-versus-bottom comparison among schools in the ZIP code because Thornton Township High School is the only one listed. Within its results, math was marginally closest to the state average, with an average gap of 27.6 points; science was nearly the same at 27.7 points, while ELA had the largest gap at 31.7 points. Results were mostly below those in Thornton Township HSD 205, but there were exceptions: ACT grade 11 science and PreACT grade 10 science each exceeded the district by about 1 point, as did grade 9 math. School ELA results trailed the district by about 1 to 4 points.
The overall state gap narrowed by about 2 points between 2024–2025 and 2025–2026: the school’s average rose from 17% to 18%, while the state average moved from 48% to 47%. Results varied by grade and subject—grade 10 science rose 7 points, while grade 9 science fell 8. SchoolDigger’s school percentile position declined from 22 to 11 to 6 across those years; SchoolDigger lists the district at rank 735 of 738, with 0 stars. Other context: graduation was 80%, versus 90% statewide, and chronic absenteeism was 44%, versus 24% statewide, in 2025–2026. In 2024–2025, the school had a 14.2 student-teacher ratio and 88% of students were free/reduced lunch eligible.
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