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If you could change one rule at Costello Elementary School, what would it be?
Community prompt from u/allk12. Replies below.
Enrollment
395
Elementary
DISTRICT 381 · STATE 369
SCHOOL COMMUNITY·TROY SCHOOL DISTRICT·NCES 263426006972
Costello Elementary School
1333 HAMMAN DR, TROY, MI 48085 · (248) 823-3700 · Oakland County
GRADES PK–05ELEMENTARY13-CITYREGULAR SCHOOL395 STUDENTS
A
allk12 Grade
Scored higher than 88% of Michigan public elementary schools
- ATest scores Share of students meeting the state standard in reading, math, and other tested subjects, 2023-24 and 2024-25.
- B+Beats expectations How far test scores land above or below what the share of low-income students predicts for a school in this state.
- ·Three-year trend Not available for this school, so the grade uses the other parts.
Grades compare a school only with schools in the same state, because every state gives its own test. How grades work · Top-graded Michigan public elementary schools
Student : Teacher
16.4:1
24 FTE teachers
DISTRICT 15.3:1 · STATE 15.8:1
Free / Reduced Lunch
10%
41 students
DISTRICT 15% · STATE 55%
Community
1
0 members
Enrollment and student:teacher ratio compared against other elementary schools. Free/Reduced Lunch and demographics compared against all schools.
Enrollment by grade, 2024-25
| Grade | Students | Share |
|---|---|---|
| Kindergarten | 50 | 13% |
| Grade 1 | 64 | 16% |
| Grade 2 | 65 | 16% |
| Grade 3 | 65 | 16% |
| Grade 4 | 76 | 19% |
| Grade 5 | 75 | 19% |
This year's kindergarten class (50) is 33% smaller than its 5th grade class (75).
Student demographics
60%Diversity index
The chance that two students picked at random belong to different racial or ethnic groups.
DISTRICT 64% · STATE 56% · US 70%
Student head counts by race/ethnicity from federal NCES enrollment data. District, state, and US figures are each group's share of all public school students in that area (US excludes territories). Very small groups may be suppressed in the source, so categories do not always sum exactly to total enrollment.
Gender split
Test scores
M-STEP 2024-25 . % Advanced + ProficientEnglish Language Arts
74.3%
MI avg 47.7%
Math
73.6%
MI avg 44.8%
What this means: On the M-STEP, Michigan's statewide test, about 74 of every 100 students at this school read and write at grade level and about 74 of 100 do math at grade level. Across all Michigan schools, those numbers are about 48 and 45.
Source: M-STEP. All students, all grades. See all years and grades →
BeatsExpectations
Demographically-adjusted score · methodologyTier
AS EXPECTED
Performing as predicted given the school's student profile
Actual proficiency
69.0%
composite math + reading, all grades
Predicted
61.7%
based on MI schools with similar FRL share
Beats by
+7.3pp
above demographic expectation
What this means: About 69% of students here test proficient in math and reading, compared with the roughly 62% typical for Michigan schools with a similar share of low-income students. BeatsExpectations measures results against demographically similar schools rather than by raw scores, and this school falls within the typical range, neither among Michigan's top nor bottom 10%.
BeatsExpectations runs a per-state regression of proficiency on free/reduced-lunch share, then scores each school by residual. How this is calculated →
Schools most like Costello Elementary School
Costello Elementary School's state test result (69.0% proficient) is higher than 2 of the 5 schools below with a result.
| School | Students | Low-income | Proficient |
|---|---|---|---|
| Costello Elementary School this school | 395 | 10.4% | 69.0% |
| Wass Elementary School TROY | 413 | 8.5% | 70.4% |
| Ann L Dolsen Elementary School NEW HUDSON | 427 | 12.2% | 53.1% |
| Messmore Elementary School STERLING HEIGHTS | 332 | 15.7% | 73.1% |
| Martell Elementary School TROY | 348 | 11.5% | 62.4% |
| Musson Elementary School ROCHESTER HILLS | 505 | 4.8% | 79.0% |
Matched among Michigan elementary schools on enrollment, the share of students from low-income families (eligible for free or reduced-price lunch), and racial and ethnic makeup. Proficient is the average share of students meeting the state standard across all of the school's state tests in 2023-24 and 2024-25, the same combined score our test-score rankings use. Online schools and schools serving specialized populations are not matched.
Where Costello Elementary School ranks
Among elementary schools| Measure | This school | In Michigan | In Oakland County |
|---|---|---|---|
| State test proficiency ranked highest first | 69.0% | #79 of 1,085 | #14 of 147 |
| Math proficiency ranked highest first | 73.6% | #59 of 1,072 | #11 of 144 |
| Reading proficiency ranked highest first | 74.3% | #46 of 1,139 | #10 of 157 |
| Enrollment ranked largest first | 395 | #682 of 1,630 | #103 of 178 |
| Students per teacher ranked fewest first | 16.4:1 | #830 of 1,424 | #113 of 170 |
| Diversity index ranked most diverse first | 59.7% | #266 of 1,424 | #47 of 170 |
| Free and reduced lunch ranked highest share first | 10.4% | #1,511 of 1,563 | #149 of 175 |
| Enrollment change since 2017-18 ranked fastest growth first | +10.0% | #187 of 440 | #22 of 48 |
Ranked against other public elementary schools. Online schools are left out of every list, and test-score lists leave out schools that serve specialized populations. Each rank links to the full list. Arrows under a test-score rank show places moved since the prior test year, among schools tested both years.
4-year change
SY 2020-21 vs SY 2024-25Enrollment
395
-12 (-3%) vs 2020
-4% since 1990-91, when it was 413
Student : Teacher
16.4:1
was 16.3:1
Source: NCES Common Core of Data
Enrollment and staffing by year
| School year | Students | Teachers (FTE) | Students per teacher | Free and reduced lunch |
|---|---|---|---|---|
| 2024-25 | 395 | 24.1 | 16.4:1 | 10% (41) |
| 2023-24 | 406 | 24.7 | 16.5:1 | 15% (60) |
| 2022-23 | 431 | 28.4 | 15.2:1 | 15% (64) |
| 2020-21 | 407 | 25 | 16.3:1 | 11% (46) |
| 2017-18 | 359 | 23.4 | 15.4:1 | 10% (36) |
| 2015-16 | 340 | 20 | 17.0:1 | 10% (34) |
| 2010-11 | 313 | 18 | 17.4:1 | 13% (40) |
| 2000-01 | 357 | 20 | 17.9:1 | 1% (5) |
| 1990-91 | 413 | N/A | N/A | N/A |
Source: NCES Common Core of Data. Rows are the federal collections on file for Costello Elementary School.
Since 2017-18: students up 10% (359 to 395); teachers up 3% (23.4 to 24.1).
About Costello Elementary School
Costello Elementary School is one of the public schools in TROY, Michigan. It is a mid-sized elementary school. Federal data show 395 students enrolled in pre-K through 5 in 2024-25.
Costello Elementary School is in Troy School District, a district with 11,596 students across 21 schools.
The share of White students at Costello Elementary School is 55%, a majority. Smaller groups are 31% Asian, 6% Hispanic, and 6% multiracial. For comparison, the population of Oakland County is roughly 69% White. Its diversity index, the chance that two randomly chosen students belong to different racial or ethnic groups, is 60%.
The school's 24.1 full-time-equivalent teachers translate to a student-to-teacher ratio of 16.4:1. The ratio is within a point of the 15.8:1 average for elementary schools in Michigan. At Costello Elementary School, 10% of students qualify for free or reduced-price lunch in 2024-25. On average, public schools in Oakland County report 32%.
On the allk12 Grade, Costello Elementary School lands at A, ahead of 88% of Michigan public elementary schools.
On the allk12 BeatsExpectations measure, Costello Elementary School is 7.3 points above the average proficiency rate across its state test results predicted for its free or reduced-price lunch share: 69.0% actual, 61.7% predicted. That is outside both the top and bottom 10% in Michigan.
The county, Oakland County, is where the school is located. The median household earns about $97,760 a year, 51% of adults hold a bachelor's degree or higher, and about 5% of residents live below the federal poverty line. Counting Costello Elementary School, Oakland County has 345 public schools.
A public school about 0.5 miles away, Athens High School, is the closest to Costello Elementary School. Inside a five-mile radius, there are at least 8 other public schools. The school's 69.0% average proficiency ranks 2nd among 7 nearby schools.
For locale, NCES codes Costello Elementary School as City: Small.
The 2020-21-to-2024-25 change in enrollment was a 3% drop, from 407 to 395.
This community page is for conversations about fundraisers, report cards, and school supplies. You can also rate the school on this page.
Oakland County at a glance
View full county profilePopulation
1,279,825
Census ACS
Median income
$97,760
Household, ACS
Bachelor's+
51%
Adults 25+
Poverty rate
5%
Below federal line
Schools in county
345
169,926 students
Quick facts
Related schools
Other schools in Troy School District
- Troy High SchoolHigh · 2,032 students
- Athens High SchoolHigh · 1,468 students
- Larson Middle SchoolMiddle · 865 students
- Boulan Park Middle SchoolMiddle · 839 students
- Baker Middle SchoolMiddle · 629 students
- Smith Middle SchoolMiddle · 599 students
Other schools in TROY
- Troy High SchoolHigh · 2,032 students
- Athens High SchoolHigh · 1,468 students
- Larson Middle SchoolMiddle · 865 students
- Boulan Park Middle SchoolMiddle · 839 students
- Baker Middle SchoolMiddle · 629 students
- Smith Middle SchoolMiddle · 599 students
Nearby schools
- Athens High School0.5 mi · 1,468
- Larson Middle School0.8 mi · 865
- Leonard Elementary School1.0 mi · 400
- Barnard Elementary School1.1 mi · 400
- Troy Center for Transition1.2 mi · 23
- Baker Middle School1.2 mi · 629
Frequently asked questions
About Costello Elementary SchoolHow many students attend Costello Elementary School?
Costello Elementary School enrolls approximately 395 students in grades PK-05.
What grades does Costello Elementary School serve?
Costello Elementary School serves grades PK-05.
What is the student-teacher ratio at Costello Elementary School?
The student-to-teacher ratio at Costello Elementary School is approximately 16.4:1 (24 FTE teachers).
How diverse is Costello Elementary School?
Costello Elementary School reports a student body of 55% White, 6% Hispanic, 2% Black, 31% Asian, 6% Two or more.
Is Costello Elementary School public or private?
Costello Elementary School is a public K-12 school, overseen by Troy School District.
Data sourceSchool profile facts are sourced from the NCES. Community content is posted by allk12 members.