Summary:
The four high schools in Bremen CHSD 228 serve grades 9–12 and enroll 4,885 students, or about 1,221 per school. In the latest results, all four schools were below the state in 24 of 28 test comparisons, with mathematics showing the widest average gap at 14 percentage points. Most importantly for families comparing schools, results vary substantially: school-to-school gaps range from 19 to 32 points, and Hillcrest High School had the lowest result in seven of nine comparisons.
Oak Forest High School and Tinley Park High School lead most often, with different strengths. Oak Forest had the strongest ACT science result, at 52%, and led grade 10 and grade 9 PreACT mathematics; its ACT science result was 4 points above the state. Tinley Park led ACT mathematics and grade 10 and grade 9 PreACT ELA, scoring 56% and 65% in those ELA tests—3 and 4 points above the state. Hillcrest’s low point was grade 11 ACT science: 19%, compared with Oak Forest’s 52%, a 32-point gap. Graduation results offer a different picture: Oak Forest’s 96% and Hillcrest’s 91% were both above the state’s 90%, despite Hillcrest’s low test results.
Average test results rose by 1 point from the prior year, and the area’s average position relative to the state improved by about 1 point, but changes varied by school: Bremen High School declined by about 1 point on average, while Oak Forest and Hillcrest rose by about 1 point and Tinley Park by 2. SchoolDigger’s reported percentile ranks also fell from 2023–2024 to 2025–2026: 14 points for Bremen, 16 for Oak Forest, and 4 each for Hillcrest and Tinley Park. Other figures do not sort the schools in the same way: Hillcrest has the lowest student–teacher ratio, 14.6, while Tinley Park has the highest, 18.7. In 2021–2022, free/reduced lunch eligible shares were 54% at Hillcrest, 32% at Bremen, and 27% at each of Oak Forest and Tinley Park; these are context, not an explanation for school results.
Thank you for your feedback!