Serving 564 students in grades Kindergarten-5, Mary Lou Cowlishaw Elementary School ranks in the top 20% of all schools in Illinois for overall test scores (math proficiency is top 20%, and reading proficiency is top 20%).
The percentage of students achieving proficiency in math is 45% (which is higher than the Illinois state average of 28%). The percentage of students achieving proficiency in reading/language arts is 42% (which is higher than the Illinois state average of 30%).
The student:teacher ratio of 13:1 is equal to the Illinois state level of 13:1.
Minority enrollment is 79% of the student body (majority Asian), which is higher than the Illinois state average of 55% (majority Hispanic and Black).
Quick Stats (2025)
- Grades: Kindergarten-5
- Enrollment: 564 students
- Student:Teacher Ratio: 13:1
- Minority Enrollment: 79%
- Overall Testing Rank: Top 20% in IL
- Math Proficiency: 45% (Top 20%)
- Reading Proficiency: 42% (Top 30%)
- Science Proficiency: 55-59% (Top 50%)
- Source: National Center for Education Statistics (NCES), IL Dept. of Education
Top Rankings
Mary Lou Cowlishaw Elementary School ranks among the top 20% of public schools in Illinois for:
Category
Attribute
Overall Rank
Math Proficiency
Diversity
School Overview
Mary Lou Cowlishaw Elementary School's student population of 564 students has declined by 19% over five school years.
The teacher population of 44 teachers has stayed relatively flat over five school years.
Grades Offered
Grades Kindergarten-5
Total Students
564 students
Gender %
Total Classroom Teachers
44 teachers
Students by Grade
School Rankings
Mary Lou Cowlishaw Elementary School ranks within the top 20% of all 3,426 schools in Illinois (based off of combined math and reading proficiency testing data).
The diversity score of Mary Lou Cowlishaw Elementary School is 0.72, which is more than the diversity score at state average of 0.70. The school's diversity has stayed relatively flat over five school years.
Overall Testing Rank
#531 out of 3426 schools
(Top 20%)
(Top 20%)
Math Test Scores (% Proficient)
(20-21)45%
28%
Reading/Language Arts Test Scores (% Proficient)
42%
30%
Science Test Scores (% Proficient)
55-59%
50%
Student : Teacher Ratio
13:1
13:1
American Indian
n/a
1%
Asian
43%
6%
Hispanic
20%
28%
Black
12%
16%
White
21%
45%
Hawaiian
n/a
n/a
Two or more races
4%
4%
All Ethnic Groups
Eligible for Free Lunch
24%
43%
Eligible for Reduced Lunch
6%
4%
School Statewide Testing
School District Name
Source: National Center for Education Statistics (NCES), IL Dept. of Education
Profile last updated: 02/09/2025
Frequently Asked Questions
What is Mary Lou Cowlishaw Elementary School's ranking?
Mary Lou Cowlishaw Elementary School is ranked #531 out of 3,426 schools, which ranks it among the top 20% of public schools in Illinois.
What schools are Mary Lou Cowlishaw Elementary School often compared to?
Mary Lou Cowlishaw Elementary Schoolis often viewed alongside schools like May Watts Elementary School by visitors of our site.
What percent of students have achieved state testing proficiency in math and reading?
45% of students have achieved math proficiency (compared to the 28% IL state average), while 42% of students have achieved reading proficiency (compared to the 30% IL state average).
How many students attend Mary Lou Cowlishaw Elementary School?
564 students attend Mary Lou Cowlishaw Elementary School.
What is the racial composition of the student body?
43% of Mary Lou Cowlishaw Elementary School students are Asian, 21% of students are White, 20% of students are Hispanic, 12% of students are Black, and 4% of students are Two or more races.
What is the student:teacher ratio of Mary Lou Cowlishaw Elementary School?
Mary Lou Cowlishaw Elementary School has a student ration of 13:1, which is equal to the Illinois state average of 13:1.
What grades does Mary Lou Cowlishaw Elementary School offer ?
Mary Lou Cowlishaw Elementary School offers enrollment in grades Kindergarten-5
What school district is Mary Lou Cowlishaw Elementary School part of?
Mary Lou Cowlishaw Elementary School is part of Indian Prairie CUSD 204 School District.
In what neighborhood is Mary Lou Cowlishaw Elementary School located?
Mary Lou Cowlishaw Elementary School is located in the Naperville Park District neighborhood of Naperville, IL. There are 35 other public schools located in Naperville Park District.
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