Serving 221 students in grades Prekindergarten-5, Costello School ranks in the bottom 50% of all schools in Illinois for overall test scores (math proficiency is bottom 50%, and reading proficiency is bottom 50%).
The percentage of students achieving proficiency in math is 6-9% (which is lower than the Illinois state average of 28%). The percentage of students achieving proficiency in reading/language arts is 30-34% (which is approximately equal to the Illinois state average of 30%).
The student:teacher ratio of 9:1 is lower than the Illinois state level of 13:1.
Minority enrollment is 88% of the student body (majority Hispanic), which is higher than the Illinois state average of 55% (majority Hispanic).
Quick Stats (2025)
- Grades: Prekindergarten-5
- Enrollment: 221 students
- Student:Teacher Ratio: 9:1
- Minority Enrollment: 88%
- Overall Testing Rank: Bottom 50% in IL
- Math Proficiency: 6-9% (Btm 50%)
- Reading Proficiency: 30-34% (Top 50%)
- Science Proficiency: 40-49% (Btm 50%)
- Source: National Center for Education Statistics (NCES), IL Dept. of Education
Top Rankings
Costello School ranks among the top 20% of public schools in Illinois for:
Category
Attribute
Most improved public schools
Student Attention
School Overview
Costello School's student population of 221 students has declined by 26% over five school years.
The teacher population of 25 teachers has declined by 7% over five school years.
Grades Offered
Grades Prekindergarten-5
Total Students
221 students
Gender %
Total Classroom Teachers
25 teachers
Students by Grade
School Rankings
Costello School ranks within the bottom 50% of all 3,426 schools in Illinois (based off of combined math and reading proficiency testing data).
The diversity score of Costello School is 0.35, which is less 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
#2081 out of 3426 schools
(Bottom 50%)
(Bottom 50%)
Math Test Scores (% Proficient)
(20-21)6-9%
28%
Reading/Language Arts Test Scores (% Proficient)
30-34%
30%
Science Test Scores (% Proficient)
40-49%
50%
Student : Teacher Ratio
9:1
13:1
American Indian
1%
1%
Asian
n/a
6%
Hispanic
80%
28%
Black
5%
16%
White
12%
45%
Hawaiian
n/a
n/a
Two or more races
2%
4%
All Ethnic Groups
Eligible for Free Lunch
79%
43%
Eligible for Reduced Lunch
15%
4%
School Statewide Testing
School District Name
Source: National Center for Education Statistics (NCES), IL Dept. of Education
Frequently Asked Questions
What is Costello School's ranking?
Costello School is ranked #2081 out of 3,426 schools, which ranks it among the bottom 50% of public schools in Illinois.
What percent of students have achieved state testing proficiency in math and reading?
6-9% of students have achieved math proficiency (compared to the 28% IL state average), while 30-34% of students have achieved reading proficiency (compared to the 30% IL state average).
How many students attend Costello School?
221 students attend Costello School.
What is the racial composition of the student body?
80% of Costello School students are Hispanic, 12% of students are White, 5% of students are Black, 2% of students are Two or more races, and 1% of students are American Indian.
What is the student:teacher ratio of Costello School?
Costello School has a student ration of 9:1, which is lower than the Illinois state average of 13:1.
What grades does Costello School offer ?
Costello School offers enrollment in grades Prekindergarten-5
What school district is Costello School part of?
Costello School is part of Lyons SD 103 School District.
School Calendar
View the Costello School yearly calendar below. Note key dates such as:
Event
Date
No School: Spring Break (Costello)
March 31, 2025 (Monday)
No School: Spring Break (Costello)
April 01, 2025 (Tuesday)
No School: Spring Break (Costello)
April 02, 2025 (Wednesday)
No School: Spring Break (Costello)
April 03, 2025 (Thursday)
No School: Spring Break (Costello)
April 04, 2025 (Friday)
School Reviews
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