IllinoisSchoolsCostello School

Costello School

PublicRegular
Lyons, Illinois · Lyons SD 103
Students221enrolled
FRL75%Free/Reduced Lunch
Ratio8.8:1students:teacher
LevelPrimaryRegular
SCHOOL SNAPSHOT
Students221
Grade Span
Student:Teacher8.8:1
Free/Reduced Lunch75%
Title INo
SectorPublic

Academic Performance

State accountability indicators and test performance.

IL Report Card · 2025
IL Report Card 2025: Commendable

Performance indicators

overall
Commendable

Source: California Department of Education — School Dashboard 2025 release.

Student test scores

Percentage of students who met or exceeded the grade-level standard on the most recent state assessment. Each tile is colour-coded: green ≥50%, amber 35-49%, red <35%.

ELA · IL IAR

Grade 3
54%
Grade 4
41%
Grade 5
51%
Overall
48%

Math · IL IAR

Grade 3
41%
Grade 4
27%
Grade 5
11%
Overall
25%

Source: IL IAR 2025. “Proficient” includes students who met or exceeded the standard; small-cell data (fewer than ~10 students) is suppressed by the state and shown as “—”.

How this state measures performance

State-specific testing and accountability details will appear here once the IL Department of Education data ingest completes.