Summary:
Addison, Illinois, has nine schools: seven elementary schools, one junior high school and one high school. In 2025–26, the elementary schools averaged 44% in all-grades ELA, compared with 56% statewide, and 36% in math, compared with 40% statewide; fifth-grade science averaged 39%, versus 48% statewide. The most important finding is that these averages hide a wide divide among schools: the top-to-bottom gaps were 30 percentage points in ELA and 31 points in math.
Stone Elementary School was the clearest standout, leading elementary schools with 62% in ELA and 53% in math—6 and 13 points above the state, respectively. At the other end, Army Trail Elementary School scored 32% in ELA and 22% in math, 24 and 18 points below the state. Lake Park Elementary School also exceeded the state in math, at 42%, while Wesley Elementary School was about even. In fifth-grade science, Wesley and Stone were just above the state rate; Lake Park was at 21%. Both secondary schools were below state results in their reported assessments: Indian Trail Junior High School was 48% in ELA and 26% in math, while Addison Trail High School was 44% in ACT ELA, 34% in math and 39% in science.
Elementary averages improved from 2024–25 to 2025–26: ELA rose 3 points, math 5 points and fifth-grade science 8 points. Math’s average gap with the state narrowed from 8 points to 4, but results varied by school: Lake Park’s math rose 17 points, while Stone’s ELA fell 4; Ardmore Elementary School’s fifth-grade science rose 28 points. SchoolDigger’s statewide percentile ranking also moved in different directions from 2023–24 to 2025–26: Indian Trail fell from 42 to 24, while Ardmore rose from 16 to 32. For context, all seven elementary schools reported free/reduced lunch eligible figures for 2024–25; Stone’s was 45% and Lake Park’s 84%. Elementary student-teacher ratios ranged from 9.2 at Army Trail to 11.6 at Fullerton Elementary School, with no simple pattern connecting ratio and scores.
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