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Thomas Middle School
Test scores
IAR + ISA 2024-25 . % Proficient (Levels 4-5)BeatsExpectations
Demographically-adjusted score · methodology7-year change
SY 2017-18 vs SY 2024-25About Thomas Middle School
Thomas Middle School is a well-populated middle school in Arlington Heights, Illinois, run under Arlington Heights SD 25. The school teaches 1,024 students in grades 6 through 8. That puts it 122% bigger than the typical public school in Illinois, which averages around 462 students.
Arlington Heights SD 25 comprises 9 schools with combined enrollment of 5,423 students; Thomas Middle School is among them.
On demographics, Thomas Middle School lists that 71% of the student body identifies as White. The remainder consists of 17% Asian, 9% Hispanic. The wider county runs roughly 44% White, putting the school's mix meaningfully more White than the area baseline.
Looking at school resources, Thomas Middle School records 77 full-time-equivalent teachers, putting the student-to-teacher ratio at about 13.3:1. The state averages about 13.0:1, putting this campus right in line with peers. Roughly 16% of students at Thomas Middle School qualify for free or reduced-price lunch, which schools and policymakers use as a rough income-mix signal. Set against Cook County (around 66%), the school's rate is noticeably below typical.
With demographic context factored in, Thomas Middle School performs roughly as the BeatsExpectations model predicts for a school with this FRL share. The predicted value is around 62.3%, the actual is 69.9%, a residual of +7.6 points.
Across the wider county, the surrounding county (Cook County) reports that median household income runs about $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%. In all, Cook County runs 1406 public schools (combined enrollment of about 697,934 students), of which Thomas Middle School is one.
Nearest neighbor: Olive-Mary Stitt School, around 0.2 miles off. 8 of the 8 nearest public schools sit inside a five-mile radius. Among the 8 schools in that immediate cluster with test data (this one included), Thomas Middle School ranks 5th on composite proficiency, above the local average of 69.3%.
Thomas Middle School operates from a commuter-belt location.
Five-year trend. Thomas Middle School's enrollment has rose 5% since 2018, when it stood at 974 (now 1,024). Over the same period, the Asian share rose from 12% to 17%.
Within the allk12 community for this school, the page collects discussion, questions, and updates around pickup logistics, teacher feedback, and after-school programs. Members of the school community can share what they know.
Cook County at a glance
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