Summary:
ZIP code 60540 has 10 schools—eight elementary schools, Washington Junior High, and Naperville Central High School—serving families in the Naperville area. In 2025–2026, the elementary schools’ average all-grades proficiency was 79% in ELA and 73% in math, compared with 56% and 40% statewide. The clearest overall finding is that results are above state levels, but vary substantially from one school to another.
Highlands Elementary School led elementary all-grades results, with 93% proficient in ELA and 89% in math; Prairie Elementary School was close behind in ELA at 92% and led fifth-grade science at 83%. Both received five stars and ranked in SchoolDigger’s 99th percentile; Highlands ranked 15th and Prairie 21st among elementary schools statewide. At the lower end, May Watts Elementary School had the lowest ELA result at 63%, while Mary Lou Cowlishaw Elementary had the lowest math result at 52%; both were still above their respective state results. Washington Junior High School posted 81% in ELA and 70% in math, and its eighth-grade science result was 88%. At the high school, Naperville Central High School had 77% proficiency in each of grade-11 ACT ELA and science, and 72% in math.
Recent trends are mixed: the elementary ELA average rose about 2 points from 2024–2025 to 2025–2026, while math fell about 1 point; in both subjects, the average school-to-state advantage narrowed. Fifth-grade science also slipped, from about 76% to 72%, even as the state result rose. There are individual bright spots: Washington’s all-grades math rose 8 points, while Naperville Central’s graduation rate was 94%; its chronic absenteeism was 22%, compared with 13% in the district. School context does not neatly predict results: elementary student–teacher ratios ranged from 11.5 at Ellsworth Elementary School to 15.7 at May Watts, and 2024–2025 free/reduced lunch eligible rates ranged from 7% at Highlands to 25% at Cowlishaw. These measures offer context, not an explanation for school results.
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