Illinois School
Test scores
IAR + ISA 2024-25 . % Proficient (Levels 4-5)What this means: On the IAR + ISA, Illinois's statewide test, about 53 of every 100 students at this school read and write at grade level and about 29 of 100 do math at grade level. Across all Illinois schools, those numbers are about 51 and 38. Reading and writing scores are up about 10 points since 2023, while math scores are up about 18 points.
BeatsExpectations
Demographically-adjusted score · methodologyWhat this means: About 37% of students here test proficient in math and reading, compared with the roughly 26% typical for Illinois schools with a similar share of low-income students. BeatsExpectations measures results against demographically similar schools rather than by raw scores, and this school falls within the typical range, neither among Illinois's top nor bottom 10%.
7-year change
SY 2017-18 vs SY 2024-25About Illinois School
As a mid-tier elementary school in Park Forest, Illinois, Illinois School works with 391 students from grades K through 8, operated by Matteson ESD 162.
Within Matteson ESD 162, which oversees 7 schools and 2,405 students, Illinois School is one campus in the system.
Demographically, Illinois School reports that 91% of students identify as Black, making the school strongly Black-majority. The remainder is composed of 7% Hispanic. By comparison, Cook County as a whole is about 22% Black, so the school skews visibly more Black than its surroundings.
On the income-and-resources front, The school lists 38 full-time-equivalent teachers, for a student-teacher ratio near 10.4:1. Statewide, the average ratio sits near 13.9:1, putting Illinois School tighter than the state norm the norm. About 79% of enrolled students meet the income threshold for free or reduced-price lunch, a number frequently used as a low-income enrollment indicator. By comparison, Cook County runs at roughly 66%, so the school's eligibility rate is meaningfully above the surrounding baseline.
On a demographically-adjusted basis, Illinois School tracks the demographic baseline. The model predicts 25.7% given the school's FRL share; actual proficiency is 37.1%.
Zooming out to the county, community-level numbers for Cook County indicate median household earnings sit near $83,498, about 43% of the adult population holds a bachelor's degree or above, and census figures put the poverty rate at about 10%. Across Cook County's 1406 public schools (combined enrollment of about 697,934 students), Illinois School is one campus in the mix.
Nearest neighbor: Indiana Elem School, around 0.6 miles off. Counting just inside five miles, 8 other public schools cluster around Illinois School. Ranking that nearby cluster on reported proficiency puts Illinois School at 1st of 8; the average score across the group is 32.2%.
The school occupies a commuter-belt site.
Looking at the recent track record. Illinois School's enrollment has edged up 11% since 2018, when it stood at 351 (now 391). The student-to-teacher ratio pulled in from 11.5:1 in 2018 to 10.4:1 today.
On allk12, recent activity here tends to focus on enrollment questions, classroom assignments, and PTA news. Parents, students, alumni, and staff are welcome to weigh in.
Cook County at a glance
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