St Charles CUSD 303

Saint Charles, Illinois · 11,801 students · 18 schools

Enrollment

11,801

Schools

Location

Saint Charles, Illinois

COSMIQ projected accountability rating

Targeted

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	50.1%	52.3%
2016–17	55.2%	62.4%
2017–18	56.1%	64%

Where this district could improve

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

Schools in this district

St Charles East High SchoolSaint Charles, IL 2,076 students St Charles North High SchoolSaint Charles, IL 1,929 students Wredling Middle SchoolSaint Charles, IL 1,375 students Thompson Middle SchoolSaint Charles, IL 1,267 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">St Charles CUSD 303</div><div style="font-size:13px;color:#64748b;margin-top:3px">Saint Charles, 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">11,801</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:#0f172a">Targeted</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/st-charles-cusd-303" style="color:#0891b2;text-decoration:none" target="_blank" rel="noopener">View full profile on COSMIQ &#8594;</a></figcaption></figure>

Cite this page

COSMIQ. (2026). St Charles CUSD 303 — school district profile. Retrieved August 23, 2026, from https://getcosmiq.app/schools/IL/st-charles-cusd-303

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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 St Charles CUSD 303, 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.