A−
Mary Lou Cowlishaw Elementary
PublicElementaryGrades K–5
1212 Sanctuary Ln, Naperville, IL 60540 · (630) 428-6100 · Part of Indian Prairie Community Unit School District 204
Students
589
Students per teacher
15:1
Free or reduced lunch
25%
Setting
City
Grades
K–5
What stands out about Mary Lou Cowlishaw Elementary
- School Grade A−: near the top of Illinois’s public schools
- Math proficiency 19 pts above the state
- Enrollment down 12.6% since 2020
Test scores
EDFacts via Urban Institute Education Data Portal (SY2020-21) · 2020–21Math proficiency45%
State average 25.9%
Reading / language arts35%
State average 30.7%
Location
Directions ↗
1212 Sanctuary Ln, Naperville
Students
Enrollment by grade
Kindergarten94
Grade 194
Grade 287
Grade 3109
Grade 4105
Grade 5100
Enrollment over time
674’20
602’21
548’22
564’23
589’24
Down 12.6% since 2020.
Who goes here
Asian 41%White 24%Hispanic 18%Black 13%Two or more races 4%American Indian/Alaska Native <1%
As reported to NCES, share of students with a reported race or ethnicity.
What neighbors say
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Parents talk
Conversations in Town Square that mention Mary Lou Cowlishaw Elementary.
Other schools in Indian Prairie Community Unit School District 204
School facts: U.S. Department of Education (NCES), 2024-2025 school year. Scores: EDFacts via Urban Institute Education Data Portal (SY2020-21). The School Grade is our own summary of state test results. Neighbor ratings are opinions, not an official measure of school quality.