Willowbrook Middle School
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Test scores
IAR + ISA 2024-25 . % Proficient (Levels 4-5)What this means: On the IAR + ISA, Illinois's statewide test, about 87 of every 100 students at this school read and write at grade level and about 55 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 11 points since 2023, while math scores are up about 3 points.
BeatsExpectations
Demographically-adjusted score · methodologyWhat this means: About 68% of students here test proficient in math and reading, compared with the roughly 62% 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 Willowbrook Middle School
Willowbrook Middle School is an intermediate school of cozy scale in South Beloit, Illinois, operated by Prairie Hill CCSD 133, teacheing 348 students in grades 5 through 8. By comparison, Illinois's public schools average about 462 students each, so Willowbrook Middle School sits 25% below that benchmark.
Willowbrook Middle School is one of 2 schools operated by Prairie Hill CCSD 133, a district that teaches 795 students overall.
On the student-mix side, Willowbrook Middle School reports that 80% of the student body identifies as White. Beyond that, the school logs 9% Hispanic, 5% multiracial, 3% Black, 3% Asian. The wider county runs roughly 66% White, putting the school's mix noticeably more White than the area baseline.
On the income-and-resources front, Willowbrook Middle School reports 25 full-time-equivalent teachers, putting the student-to-teacher ratio at about 13.9:1. The state averages around 13.0:1, so this campus is higher than the state norm typical. An estimated 16% of students are eligible for free or reduced-price lunch, which schools and policymakers use as a rough income-mix signal. That share is lower than Winnebago County's rate of about 61%.
Adjusting for the school's free-and-reduced-lunch share, Willowbrook Middle School tracks the demographic baseline. The model predicts 62.4% given the school's FRL share; actual proficiency is 68.1%.
Around the school, census data for Winnebago County shows median household earnings sit near $65,837, 25% of adults hold a bachelor's degree or higher, and roughly 11% of residents live below the federal poverty line. In all, Winnebago County runs 94 public schools (combined enrollment of about 44,103 students), of which Willowbrook Middle School is one.
Nearest neighbor: Prairie Hill Elem School, around 0.9 miles off. Within five miles, there are 8 other public schools. On composite proficiency, Willowbrook Middle School comes 2nd of 7 in the immediate cluster, higher than the nearby-schools average of 46.3%.
The school occupies a low-density site.
Five-year trend. Looking back 7 years, enrollment at Willowbrook Middle School has grew 7%, going from 326 students in 2018 to 348 in 2025. Over the same period, the White share declined from 87% to 80%. The student-to-teacher ratio fell from 14.9:1 in 2018 to 13.9:1 today.
In the discussion threads here, recent activity here tends to focus on classroom updates, athletics, and weather closures. Members of the school community can share what they know.
Winnebago County at a glance
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Related schools
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- Prairie Hill Elem School0.9 mi · 447
- Ledgewood Elem School2.5 mi · 375
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- Roscoe Middle School2.7 mi · 596
- Clark Elementary School2.8 mi · 185
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