Summary:
Schools in ZIP code 60439 include five schools—three elementary schools, one middle school and one high school—with 3,948 students in all. Chronic absenteeism is below the state rate at every school: rates range from 5% at River Valley School to 13% at Old Quarry Middle School, compared with 24% statewide. The most important finding is that every test result supplied is above its matching state result, though the schools serve different grades and cannot be fairly ranked overall from these data.
Lemont Township High School and Old Quarry stand out most in the reported results. Lemont’s 11th-grade ACT proficiency rates beat the state by 30 points in ELA, 29 in math and 26 in science; its graduation rate was 98%, versus 90% statewide. Old Quarry’s all-grades IAR rates were 87% in ELA and 71% in math, about 31 points above the state in each subject. Central School also exceeded state results, but its all-grades margins were smaller: 11 points in ELA and 19 in math. River Valley School was 20 points above the state in third-grade ELA and 22 points above in math. Oakwood School has no test results in the supplied data, so its academic standing cannot be assessed here.
Recent changes are mixed: Old Quarry math rose 5 points year over year, while its ELA margin over the state narrowed by 2 points; Central fifth-grade science climbed 19 points, even as its all-grades math score fell 5 points. SchoolDigger rankings also place Lemont and Old Quarry highly: Lemont improved from 43rd of 697 schools to 27th of 620, and Old Quarry from 88th of 1,363 to 66th of 1,126. The 2024–2025 free/reduced lunch eligible figures range from 15% to 20%, averaging 18%; student-teacher ratios are close, from 15.0 to 16.3. These measures offer context, not an explanation for test results.
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