Costello Elementary School
Score 95.9/100: better than 95% of Michigan elementary schools on 2025-26 state tests. Schools are only compared with others of the same type in the same state. How we score schools
Performance (state tests, 2025-26)
% proficient on state tests in Michigan, all students. Colored bars are green when the school is at or above the average for similar Michigan schools.
Results over time
How this school's published results have moved year by year.
All 8 published results by grade and test
As published by Michigan Center for Educational Performance and Information (MI School Data). "Hidden" means the state didn't publish the result to protect student privacy.
| Subject | Grade | Test | Result | Students tested |
|---|---|---|---|---|
| English language arts | Grade 3 | M-STEP | 64.7 | 68 |
| English language arts | Grade 4 | M-STEP | 70.6 | 68 |
| English language arts | Grade 5 | M-STEP | 75.3 | 77 |
| Math | Grade 3 | M-STEP | 75 | 68 |
| Math | Grade 4 | M-STEP | 77.6 | 67 |
| Math | Grade 5 | M-STEP | 70.1 | 77 |
| Science | Grade 5 | M-STEP | 74 | 77 |
| Social studies | Grade 5 | M-STEP | 57.1 | 77 |
School profile
- Grades
- PK-5
- Students
- 406
- Type
- Elementary school
- Charter school
- No
- Program
- Regular
Students
District and location
Contact
"Typical" is the middle (median) elementary school in Michigan. Higher or lower is not in itself better or worse. Address, phone and website are as the state reported them to the U.S. Department of Education for 2024-25, so check with the school before visiting. School details: U.S. Department of Education, Common Core of Data (enrollment 2023-24, lunch eligibility 2024-25).
Nearby elementary schools
Straight-line distance. Check the district's attendance zones: living close to a school doesn't guarantee a place.
Explore schools around Troy
Location
Official sources
Every figure on this page comes from published government data. Check the originals here; we refresh when states release new results.
U.S. Department of Education, National Center for Education Statistics, Common Core of Data (CCD): school directory, grades served, enrollment and free/reduced-price lunch, 2023-24 and 2024-25. Spotted a mistake? Tell us.
Costello Elementary School at a glance
Costello Elementary School is a public elementary school in Troy, Michigan, serving grades PK-5. It is part of Troy School District. It has about 406 students (a typical Michigan elementary school has 366). About 10% of students are eligible for free or reduced-price lunch, compared with 50% at a typical Michigan elementary school, which is useful context when reading test results.
In 2025-26 state tests, 70% in English language arts (similar schools: 44%) and 74% in math (similar schools: 41%) reached the state standard (% proficient). On our score, which compares it only with other Michigan elementary schools, it scores 95.9 out of 100: better than 95% of them, ranking #51 of 1,239. Its English language arts result fell by 4 points from the year before. This overview is generated automatically from published state and federal data; figures are rounded, and you can check the originals via the official sources above.
Page updated 2026-10-12.