Naperville CUSD 203

Naperville, Illinois · 16,073 students · 22 schools

Enrollment

16,073

Schools

Location

Naperville, Illinois

COSMIQ projected accountability rating

Commendable

on Illinois's tier accountability scale

Confidence 70% Data completeness 100% Based on 2023–24 data

This is an independent estimate generated by COSMIQ's open Rating Predictor from public math & reading proficiency — it is not an official Illinois rating, and states weight many additional factors.

How this is calculated →Run the live predictor →

Proficiency trend

Percent of students proficient on the state assessment.

School year	Math	Reading / ELA
2015–16	61.5%	68.9%
2016–17	63.8%	70.2%
2017–18	63%	72.7%

Where this district could improve

Math proficiency
Worth 50% of the formula; you're at 60% of max points.
ELA proficiency
Worth 50% of the formula; you're at 70% of max points.

Schools in this district

Naperville North High SchoolNaperville, IL 2,553 students Naperville Central High SchoolNaperville, IL 2,551 students Kennedy Junior High SchoolLisle, IL 931 students Jefferson Jr High SchoolNaperville, IL 817 students Lincoln Jr High SchoolNaperville, IL 766 students Elmwood Elem SchoolNaperville, IL 712 students Steeple Run Elem SchoolNaperville, IL 638 students

Methodology & sources

NCES Common Core of Data (CCD) directory (as of 2018)
U.S. Dept. of Education EDFacts assessment results (as of 2018)
Illinois accountability framework (tier). Phase 1a uses math+ELA proficiency only with generic regime cutpoints; per-state component weights ship in Phase 1b. (as of 2026-05-27)

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<figure style="font-family:system-ui,-apple-system,sans-serif;border:1px solid #e2e8f0;border-radius:12px;padding:20px 22px;max-width:480px;background:#ffffff;color:#0f172a;margin:0;line-height:1.4"><div style="font-size:15px;font-weight:700">Naperville CUSD 203</div><div style="font-size:13px;color:#64748b;margin-top:3px">Naperville, Illinois &middot; Public school district</div><div style="display:flex;flex-wrap:wrap;margin-top:14px"><div style="margin-right:20px"><div style="font-size:11px;text-transform:uppercase;letter-spacing:.04em;color:#94a3b8;margin-bottom:2px">Enrollment</div><div style="font-size:22px;font-weight:700;color:#0f172a">16,073</div></div><div><div style="font-size:11px;text-transform:uppercase;letter-spacing:.04em;color:#94a3b8;margin-bottom:2px">Projected Rating (tier)</div><div style="font-size:22px;font-weight:700;color:#d97706">Commendable</div></div></div><figcaption style="font-size:11px;color:#94a3b8;margin-top:14px;padding-top:12px;border-top:1px solid #f1f5f9">Data: NCES / EDFacts (2024 data) &middot; <a href="https://getcosmiq.app/schools/IL/naperville-cusd-203" style="color:#0891b2;text-decoration:none" target="_blank" rel="noopener">View full profile on COSMIQ &#8594;</a></figcaption></figure>

Cite this page

COSMIQ. (2026). Naperville CUSD 203 — school district profile. Retrieved August 23, 2026, from https://getcosmiq.app/schools/IL/naperville-cusd-203

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About this profile. COSMIQ is an independent, free AI tutoring service and is not affiliated with, endorsed by, or sponsored by Naperville CUSD 203, Illinois, or any government education agency. All figures are drawn from public U.S. Department of Education data (NCES Common Core of Data and EDFacts). Any projected rating is an independent estimate, not an official score. COSMIQ does not collect or publish user reviews or ratings of schools.

Data last refreshed August 7, 2026.