- Enrollment
- 659
- Students per teacher
- 11.4:1
- Resource Index
- 28/100
Other / mixed grade configuration · Lyons, IL
Costello School
Federal NCES profile for Costello School, including enrollment, faculty, free-lunch eligibility, demographics, and resource indicators - Resource Investment Index 33/100.
2024-25 NCES dataOther / mixed grade configurationNCES 172385003902
👥 S:T ratio 68
🌟 Gifted program 30
📋 Attendance 0
Scored 0–100 from federal NCES and CRDC indicators, resource allocation, not test scores. Full methodology →
The verdict
Costello School earns 33/100 on the Resource Investment Index, with class sizes smaller than 97% of Illinois schools.
- #2 of 3
- public schools in Lyons · Resource Index
- 33
- Resource Index · Typical
- 8.1:1
- small classes for Illinois
- 228
- students enrolled
Costello School has class sizes smaller than 97% of Illinois schools. Computed live against every Illinois school reporting to NCES.
By Resource Investment Index, Costello School ranks #2 of 3 public schools in Lyons, IL.
School address
CCD year-over-year · 2022-23 → 2023-24
-36 students YoY
Costello School shrank from 257 students in 2022-23 to 221 in 2023-24 (-14.0%).
Teacher FTE lost 28.2 → 25.2 across the same CCD years.
Source: NCES Common Core of Data public-school universe (2022-23, 2023-24).
Shrinking CCD campus
-36 students YoY 172385003902 · Lyons, IL Other · SMALL · TRAD
228 enr · 8.1:1 · RII 33
Nearest enrollment peer: Washington Middle School (659 students)
Costello School shrank from 257 students in 2022-23 to 221 in 2023-24 (-14.0%). Teacher FTE lost 28.2 → 25.2 across the same CCD years. Read with this school → · District book → · Illinois schools → · Find another →
Costello School in the enrollment neighbourhood
Fall enrollment among this campus and nearest district peers
- Washington Mid
Washington Middle School
659 students
- Lincoln Elem S
Lincoln Elem School
366 students
- Edison Elem Sc
Edison Elem School
282 students
- Home Elem Scho 256
Home Elem School
256 students
- J W Robinson J 251
J W Robinson Jr Elem School
251 students
- This school 228
Costello School
228 students
What this shows Costello School reports 228 students on the CCD universe file.
How Costello School compares
Costello School is a shrinking campus on CCD: ratios and free-lunch share vs Illinois and U.S. means.
| Metric | This school | vs Illinois | Illinois avg | U.S. avg |
|---|---|---|---|---|
| Students per teacher | 8.1:1 | ▼ 42% | 14:1 | 15.7:1 |
| Enrollment | 228 | top 78% | - | - |
Source: NCES Common Core of Data School-level CCD + state/national means from Public School Universe · 2024-25
8.1:1
Leaner classes than 95% of US schools, among the more generously staffed nationally.
228
Bigger than 23% of US schools by enrollment, mid-sized for the country.
Equity indicators methodology
Staffing depth
8.1:1
students per teacher
- 42% below state mean
Top 3% in Illinois - lower ratio than 97% of state schools
Well under the widely cited 15:1 individualized-attention benchmark, among the leaner class loads nationally.
Engagement
45.6%
chronically absent (missed 10%+ of school days)
At or above 20%, the commonly used threshold for "high" chronic absenteeism, signaling significant barriers to regular attendance.
Funding equity
$19,997
per pupil, district-wide
- above Illinois avg of $18,196
Somewhat above the U.S. public-school average, reflecting higher local or state investment per enrolled student.
Support staff
Counselors0.0 FTE
Student-support staffing from the Civil Rights Data Collection.
Discipline context
0
in-school suspensions + 0 out-of-school
Suspension rate: 0.0 per 100 students. Combined in-school and out-of-school rate: 0.0 per 100 students. Reported via the Civil Rights Data Collection.
Student demographics
Hispanic or Latino 83.8%
White 9.2%
African American 3.1%
Asian 1.8%
Two or More 1.8%
American Indian / Alaska Native 0.4%
Largest group: Hispanic or Latino at 83.8% of enrollment.
Student-body diversity index 28.8/100
Simpson diversity index - at 28.8, Costello School is less mixed than the Illinois school average of 38.9.
Programs
District finance for Lyons Sd 103 reports $19,997 per pupil (NCES F-33) - open the district page for the full revenue mix.
How Costello School Compares to District-Mates
| School | Enrollment | Economic Profile | Student-Teacher Ratio |
|---|---|---|---|
| Washington Middle School | Larger | No free-lunch data | Higher S:T ratio |
| Lincoln Elem School | Larger | No free-lunch data | Higher S:T ratio |
| Edison Elem School | Similar size | No free-lunch data | Higher S:T ratio |
| Home Elem School | Similar size | No free-lunch data | Higher S:T ratio |
| J W Robinson Jr Elem School | Similar size | No free-lunch data | Higher S:T ratio |
Comparisons are relative to Costello School's own figures; each column derives from NCES Common Core of Data.
Other Schools in This District
- Enrollment
- 366
- Students per teacher
- 10.2:1
- Resource Index
- 30/100
- Enrollment
- 282
- Students per teacher
- 11.8:1
- Resource Index
- 38/100
- Enrollment
- 256
- Students per teacher
- 11.6:1
- Resource Index
- 45/100
- Enrollment
- 251
- Students per teacher
- 10.5:1
- Resource Index
- 35/100
Nationwide other schools with similar size or staffing
Out-of-state peers matched by enrollment and by student-teacher ratio, not the same-city or same-district lists above.
Similar enrollment (~228 students)
Frequently asked questions about Costello School
How many students attend Costello School?
Costello School has 228 students enrolled. It is a public school in Lyons, IL. CCD year-over-year: 257 (2022-23) → 221 (2023-24), down 36.
What is the student-teacher ratio at Costello School?
The student-teacher ratio at Costello School is 8.1:1, which is 42% lower than the Illinois average of 14:1 and 48% lower than the national average of 15.7:1. Lower ratios generally mean more individual attention per student.
What is the racial and ethnic makeup of Costello School?
The largest demographic group at Costello School is Hispanic or Latino at 83.8% of enrollment, in Lyons, IL.
What is the Resource Investment Index for Costello School?
Costello School has a Resource Investment Index of 33/100 (typical reported resources relative to schools nationally) based on 3 factors: student-teacher ratio, gifted-program reporting, chronic absenteeism. Not a test-score or academic measure (national median ~41/100, see methodology).
How does Costello School rank among public schools in Lyons?
By Resource Investment Index, Costello School ranks #2 of 3 public schools in Lyons, IL. This compares federal resource and staffing data among local peers; it is not a test-score or academic ranking.
What other schools are in Lyons Sd 103?
Besides Costello School, Lyons Sd 103 also operates Washington Middle School (659 students), Lincoln Elem School (366 students), and Edison Elem School (282 students). See the Lyons Sd 103 district page for the complete list.