Enrollment
898
Michigan · 2024-25 NCES data
Middle school (grades 6-8) · South Lyon, MI
Centennial Middle School
Federal NCES profile for Centennial Middle School, including enrollment, faculty, free-lunch eligibility, demographics, and resource indicators - Resource Investment Index 22/100.
2024-25 NCES dataMiddle school (grades 6-8)NCES 263225001599
👥 S:T ratio 25
🌟 Gifted program 30
🎓 Counselors 31
📋 Attendance 0
Scored 0–100 from federal NCES and CRDC indicators, resource allocation, not test scores. Full methodology →
The verdict
Centennial Middle School earns 22/100 on the Resource Investment Index, with class sizes larger than 70% of Michigan schools.
- #9 of 9
- public schools in South Lyon · Resource Index
- 22
- Resource Index · Lower
- 18.7:1
- large classes for Michigan
- 17.0%
- free-lunch eligible
Centennial Middle School has class sizes larger than 70% of Michigan schools. Computed live against every Michigan school reporting to NCES.
By Resource Investment Index, Centennial Middle School ranks #9 of 9 public schools in South Lyon, MI.
School address
District: South Lyon Community Schools · Michigan
NCES ID 263225001599 Verify on NCES CCD record →
Teachers (FTE)
48.0
Federal CCD staff survey
Students per teacher
18.7:1
vs 17.5:1 Michigan avg
+7% vs state
Free-lunch eligible
17.0%
vs 54.3% Michigan avg
-69% vs state
Student-teacher ratio in context
How Centennial Middle School compares with Michigan and U.S. medians
What stands out at Centennial Middle School
Centennial Middle School is a lower-poverty, large middle school in South Lyon, Michigan, enrolling 898 students.
Class loads run somewhat heavier than typical: 18.7:1 puts it in the larger third of Michigan schools by student-teacher ratio.
Comparatively few students face economic hardship here, 17.0% free-meal eligibility runs 69% below the Michigan average.
By headcount it is one of the larger campuses in Michigan, bigger than 94% of state schools at 898 students.
Its Resource Investment Index lands in the lower third of 3,375 scored Michigan schools.
Among 220 similarly sized, similarly resourced-need Michigan schools statewide, it ranks #192, in the lower tier once campus size and economic need are matched.
Its student body is led by White (78%) and Asian (10%) (diversity index 38/100).
Counselor availability sits well past the ASCA benchmark, roughly 345 students sharing each counselor, though short of the most stretched campuses.
Chronic absenteeism is elevated: 47.0% of students missed 10% or more of school days (2021-22 Civil Rights Data Collection).
South Lyon Community Schools also operates South Lyon High School (1,245 students) and South Lyon East High School (1,174 students) alongside Centennial Middle School.
Sourced from NCES CCD, CRDC, and F-33 (federal records, not a quality verdict). How we source and compute this.
Source: National Center for Education Statistics Common Core of Data + CRDC + F-33 · 2024-25
How Centennial Middle School compares
Centennial Middle School on the metrics families compare, against Michigan and U.S. means.
| Metric | This school | vs Michigan | Michigan avg | U.S. avg |
|---|---|---|---|---|
| Students per teacher | 18.7:1 | ▲ 7% | 17.5:1 | 15.7:1 |
| Free-lunch eligible | 17.0% | ▼ 69% | 54.3% | 51.7% |
| Enrollment | 898 | top 6% | - | - |
Source: NCES Common Core of Data School-level CCD + state/national means from Public School Universe · 2024-25
18.7:1
Leaner classes than 21% of US schools, heavier class loads than most.
898
Bigger than 89% of US schools by enrollment, a large campus nationally.
Equity indicators (what these measure)
Economic need
17.0%
free-lunch eligible
- 69% below the Michigan average of 54.3%
Below the 40% Title I threshold, among the lower-need profiles in the state; federal aid targets individual qualifying students rather than schoolwide programs.
Staffing depth
18.7:1
students per teacher
- 7% above state mean
Top 70% in Michigan - lower ratio than 30% of state schools
Between 16:1 and 20:1, squarely in the typical U.S. public-school staffing range.
Engagement
47.0%
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
$11,755
per pupil, district-wide
- below Michigan avg of $13,507
Well below the U.S. average per-pupil spend, a notably leaner funding position that may affect programs, facilities, and staffing.
Support staff
Counselors2.6 FTE
Per 345 students, the combined health-and-guidance staffing load for this school.
Discipline context
0
in-school suspensions + 58 out-of-school
Suspension rate: 0.0 per 100 students. Combined in-school and out-of-school rate: 6.5 per 100 students. Reported via the Civil Rights Data Collection.
Overview
- Common Core of Data (June 2026): enrollment, staffing, and the student-teacher ratio above.
- Civil Rights Data Collection: discipline counts and program access (AP, gifted, special education).
- F-33 School District Finance Survey: the district-wide per-pupil spending figures below.
Three separate federal collections, each on its own reporting cadence - which is why this school's numbers line up on a consistent basis against every other school and state on this site, rather than mixing figures pulled from different survey years.
Student demographics
White 77.8%
Asian 9.7%
Hispanic or Latino 5.5%
Two or More 4.2%
African American 2.8%
Largest group: White at 77.8% of enrollment.
Student-body diversity index 38.0/100
Simpson diversity index - at 38.0, Centennial Middle School is about as mixed as the Michigan school average of 36.2.
Programs
Funding & spending
District-wide per-pupil expenditure for South Lyon Community Schools, which includes Centennial Middle School.
$11,755
Per student
-13%
vs Michigan
Avg $13,507
-29%
vs U.S.
Avg $16,593
Revenue mix
Local 30.7%
State 63.6%
Federal 5.7%
Source: NCES F-33 School District Finance Survey District-level finance · FY 2021-22 Per-pupil expenditure reflects the district-wide average. Individual school budgets are not reported at the federal level.
How Centennial Middle School Compares to District-Mates
| School | Enrollment | Economic Profile | Student-Teacher Ratio |
|---|---|---|---|
| South Lyon High School | Larger | Similar economic need | Similar S:T ratio |
| South Lyon East High School | Larger | Similar economic need | Higher S:T ratio |
| Millennium Middle School | Similar size | Similar economic need | Higher S:T ratio |
| William a Pearson Elementary | Smaller | Similar economic need | Similar S:T ratio |
| Sharon J Hardy Elementary School | Smaller | Similar economic need | Lower S:T ratio |
Comparisons are relative to Centennial Middle School's own figures; each column derives from NCES Common Core of Data.
Other Schools in This District
- Enrollment
- 1,245
- Students per teacher
- 17.3:1
- Resource Index
- 32/100
- Enrollment
- 1,174
- Students per teacher
- 21:1
- Resource Index
- 27/100
- Enrollment
- 1,049
- Students per teacher
- 20.2:1
- Resource Index
- 33/100
- Enrollment
- 576
- Students per teacher
- 19.9:1
- Resource Index
- 45/100
- Enrollment
- 570
- Students per teacher
- 14.6:1
- Resource Index
- 36/100
Similar middle schools statewide
Matched by enrollment size and by staffing ratio across all of Michigan, not just this city - a different peer set than the local comparisons above.
Similar enrollment (~898 students)
Similar student-teacher ratio (~18.7:1)
Next steps
Verify locally before acting on Centennial Middle School's federal record.
- Compare Centennial Middle School against another school. Compare schools
- South Lyon Community Schools's spending and staffing shape this school. District profile
- Confirm current enrollment and boundaries with the school. Choosing guide
Federal record (CCD 2024-25, CRDC 2021-22) - PlainSchools assigns no subjective rating; the composite quality score is a transparent, reproducible index computed from this cited federal data.
Frequently asked questions about Centennial Middle School
How many students attend Centennial Middle School?
Centennial Middle School has 898 students enrolled. It is a middle school in South Lyon, MI.
What is the student-teacher ratio at Centennial Middle School?
The student-teacher ratio at Centennial Middle School is 18.7:1, which is 7% higher than the Michigan average of 17.5:1 and 19% higher than the national average of 15.7:1.
What percentage of students receive free lunch at Centennial Middle School?
17.0% of students at Centennial Middle School are eligible for free lunch, compared to the Michigan average of 54.3%.
What is the racial and ethnic makeup of Centennial Middle School?
The largest demographic group at Centennial Middle School is White at 77.8% of enrollment, in South Lyon, MI.
What is the Resource Investment Index for Centennial Middle School?
Centennial Middle School has a Resource Investment Index of 22/100 (lower reported resources relative to schools nationally) based on 4 factors: student-teacher ratio, counselor availability, attendance rates. Not a test-score or academic measure (national median ~41/100, see methodology).
How does Centennial Middle School rank among public schools in South Lyon?
By Resource Investment Index, Centennial Middle School ranks #9 of 9 public schools in South Lyon, MI. This compares federal resource and staffing data among local peers; it is not a test-score or academic ranking. See all public schools in South Lyon on the city page.
Is Centennial Middle School a good school?
Centennial Middle School earns 22/100 on the Resource Investment Index, with class sizes larger than 70% of Michigan schools. This is a resource snapshot, not an academic rating; see the Resource Investment Index question above for what the number does and doesn't measure.
What other schools are in South Lyon Community Schools?
Besides Centennial Middle School, South Lyon Community Schools also operates South Lyon High School (1,245 students), South Lyon East High School (1,174 students), and Millennium Middle School (1,049 students). See the South Lyon Community Schools district page for the complete list.
Related tools
Every figure on PlainSchools is rendered directly from the source NCES, CRDC and F-33 federal records, no number is typed in by an editor. Each school's figures reflect its most recent NCES/CRDC submission on file. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of June 2026.