Posen Elem School

Posen Elem School is a tight-knit primary school in Posen, Illinois, run under Posen-Robbins ESD 143-5. The school teaches 246 students in grades 4 through 5. That puts it 35% leaner than the typical public school in Illinois, which averages around 381 students.

Posen-Robbins ESD 143-5 comprises 5 schools with combined enrollment of 1,286 students; Posen Elem School is among them.

On demographics, Posen Elem School records that the largest single group is Hispanic, at 67% of enrollment. The remainder is composed of 30% Black, 2% Asian. The wider county runs roughly 27% Hispanic, putting the school's mix meaningfully more Hispanic than the area baseline.

On the income-and-resources front, The school lists 19 full-time-equivalent teachers, for a student-teacher ratio near 13.2:1. Statewide, the average ratio sits near 13.9:1, putting Posen Elem School tighter than the state norm the norm. An estimated 91% of students are eligible for free or reduced-price lunch, a commonly cited indicator of low-income enrollment. By comparison, Cook County runs at roughly 66%, so the school's eligibility rate is above the surrounding baseline.

On a residual basis (actual vs predicted given the student mix), Posen Elem School sits in the top 10% of Illinois schools after the BeatsExpectations adjustment. Predicted proficiency for the school's FRL share is roughly 18.7%; actual is 33.0%, +14.3 points clear of the demographic baseline.

Across the wider county, the surrounding county (Cook County) reports that 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), Posen Elem School is one campus in the mix.

The closest other public school is Gordon School, roughly 0.5 miles away. Within five miles, there are 8 other public schools. On composite proficiency, Posen Elem School comes 4th of 7 in the immediate cluster, higher than the nearby-schools average of 28.7%.

The school occupies an outer-ring site.

Five-year trend. Posen Elem School's enrollment has declined 30% since 2018, when it stood at 349 (now 246). Over the same period, the Hispanic share edged up from 58% to 67%. Class-load math has fell: from 15.9:1 in 2018 to 13.2:1 in 2025.

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