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Thompson Jr High 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 Thompson Jr High School
Thompson Jr High School is a 6-8 campus of substantial scale in Oswego, Illinois, run under CUSD 308, caters to 832 students in grades 6 through 8. Enrollment runs roughly 80% larger than the state mean of about 462.
Thompson Jr High School is one of 21 schools operated by CUSD 308, a district that enrolls 16,766 students overall.
In terms of who attends, Thompson Jr High School records that 43% of students identify as Hispanic, with the remaining enrollment distributed across several groups. Other groups include 38% White, 13% Black, 4% multiracial. That is meaningfully more Hispanic than the county at large, where the share is closer to 22%.
On the resource side, Staff filings list 50 full-time-equivalent teachers, which works out to roughly 16.8:1 students per teacher. The state averages around 13.0:1, so this campus is higher than the state norm typical. An estimated 42% of students are eligible for free or reduced-price lunch, which schools and policymakers use as a rough income-mix signal. Set against Kendall County (around 32%), the school's rate is noticeably above typical.
With demographic context factored in, Thompson Jr High School sits in the middle band of the BeatsExpectations distribution. Schools with this campus's student mix typically land near 47.2%; this one delivers 37.4%.
In the broader community, census data for Kendall County shows median household income runs about $111,601, roughly 37% of adults have completed at least a four-year degree, and roughly 5% of residents live below the federal poverty line. Thompson Jr High School is one of 50 public schools in Kendall County (combined enrollment of about 29,773 students).
Nearest neighbor: Old Post Elementary School, around 0.6 miles off. Within five miles, there are 8 other public schools. Among the 9 schools in that immediate cluster with test data (this one included), Thompson Jr High School ranks 7th on composite proficiency, beneath the local average of 45.7%.
Geographically, the school is in a suburban area.
Looking at the recent track record. Over the past 7-year window, the student count fell 6%: 886 students in 2018 compared to 832 in 2025. White enrollment moved from 55% to 38% across the same window. Class-load math has loosened: from 15.5:1 in 2018 to 16.8:1 in 2025.
Within the allk12 community for this school, recent activity here tends to focus on science fair prep, picture-day reminders, and bus-route questions. Contributors range from current parents to recent graduates and teachers.
Kendall County at a glance
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