Enrollment
148
Michigan · 2024-25 NCES data
Other / mixed grade configuration · Warren, MI
Academy 21
Federal NCES profile for Academy 21, including enrollment, faculty, free-lunch eligibility, demographics, and resource indicators - Resource Investment Index 28/100.
2024-25 NCES dataOther / mixed grade configurationNCES 260858008255
👥 S:T ratio 41
🌟 Gifted program 30
📋 Attendance 12
Scored 0–100 from federal NCES and CRDC indicators, resource allocation, not test scores. Full methodology →
The verdict
Academy 21 earns 28/100 on the Resource Investment Index, even as it posts class sizes smaller than 70% of Michigan schools. It is also more racially and ethnically mixed than most Michigan schools.
- #2 of 10
- schools in Warren · Resource Index
- 28
- Resource Index · Lower
- 14.8:1
- small classes for Michigan
- 74.1%
- free-lunch eligible
Academy 21 has class sizes smaller than 70% of Michigan schools. Computed live against every Michigan school reporting to NCES.
By Resource Investment Index, Academy 21 ranks #2 of 10 schools in Warren, MI.
School address
District: Center Line Public Schools · Michigan
NCES ID 260858008255 Verify on NCES CCD record →
Teachers (FTE)
10.0
Federal CCD staff survey
Students per teacher
14.8:1
vs 17.5:1 Michigan avg
-15% vs state
Free-lunch eligible
74.1%
vs 54.3% Michigan avg
+36% vs state
Student-teacher ratio in context
How Academy 21 compares with Michigan and U.S. medians
What stands out at Academy 21
Academy 21 is a higher-need, mid-sized combined-grade school in Warren, Michigan, enrolling 148 students.
Class sizes run a bit leaner than typical: 14.8:1 puts it in the smaller third of Michigan schools by student-teacher ratio.
Economic need runs somewhat above the state's typical profile, with 74.1% of students eligible for free meals.
Enrollment of 148 puts it in the smaller third of Michigan schools by headcount.
Its Resource Investment Index sits near the middle of the pack among 3,375 scored Michigan schools.
Against 208 statewide peers matched on enrollment and economic need, it ranks mid-pack at #116.
Its student body is led by White (44%) and African American (33%), more mixed than most schools in the state (diversity index 67/100).
Chronic absenteeism is elevated: 35.1% of students missed 10% or more of school days (2021-22 Civil Rights Data Collection).
Among Warren's public schools, it stands alongside Michigan Mathematics and Science Academy Dequindre (573 students): Academy 21 is smaller than that campus by headcount and runs heavier classes (14.8:1 vs 13.6:1).
Center Line Public Schools also operates Center Line High School (646 students) and Wolfe Middle School (506 students) alongside Academy 21.
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 Academy 21 compares
Academy 21 on the metrics families compare, against Michigan and U.S. means.
| Metric | This school | vs Michigan | Michigan avg | U.S. avg |
|---|---|---|---|---|
| Students per teacher | 14.8:1 | ▼ 15% | 17.5:1 | 15.7:1 |
| Free-lunch eligible | 74.1% | ▲ 36% | 54.3% | 51.7% |
| Enrollment | 148 | top 81% | - | - |
Source: NCES Common Core of Data School-level CCD + state/national means from Public School Universe · 2024-25
14.8:1
Leaner classes than 49% of US schools, a middle-of-the-pack class size.
148
Bigger than 14% of US schools by enrollment, a small campus.
Equity indicators (what these measure)
Economic need
74.1%
free-lunch eligible
- 36% above the Michigan average of 54.3%
Above the 40% Title I schoolwide threshold; federal funds support the whole school, not individual students.
Staffing depth
14.8:1
students per teacher
- 15% below state mean
Top 30% in Michigan - lower ratio than 70% of state schools
Close to the 15:1 benchmark most often cited for individualized attention.
Engagement
35.1%
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
$14,963
per pupil, district-wide
- above Michigan avg of $13,507
Somewhat below the U.S. average per-pupil spend; funding constraints may affect programs, facilities, and staffing.
Support staff
Counselors0.0 FTE
Student-support staffing from the Civil Rights Data Collection.
Discipline context
0
in-school suspensions + 16 out-of-school
Suspension rate: 0.0 per 100 students. Combined in-school and out-of-school rate: 10.8 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 43.9%
African American 33.1%
Two or More 14.9%
Asian 4.7%
Hispanic or Latino 2.7%
American Indian / Alaska Native 0.7%
Largest group: White at 43.9% of enrollment.
Student-body diversity index 67.3/100
Simpson diversity index - at 67.3, Academy 21 is more mixed than the Michigan school average of 36.2.
Programs
AP courses offered 2
Funding & spending
District-wide per-pupil expenditure for Center Line Public Schools, which includes Academy 21.
$14,963
Per student
+11%
vs Michigan
Avg $13,507
-10%
vs U.S.
Avg $16,593
Revenue mix
Local 34.0%
State 52.0%
Federal 14.0%
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 Academy 21 Compares to District-Mates
| School | Enrollment | Economic Profile | Student-Teacher Ratio |
|---|---|---|---|
| Center Line High School | Larger | Similar economic need | Higher S:T ratio |
| Wolfe Middle School | Larger | Similar economic need | Higher S:T ratio |
| May V Peck Elementary School | Larger | Similar economic need | Higher S:T ratio |
| Mark C Roose Elementary School | Larger | Similar economic need | Lower S:T ratio |
| Crothers Elementary School | Larger | Similar economic need | Similar S:T ratio |
Comparisons are relative to Academy 21's own figures; each column derives from NCES Common Core of Data.
Other Schools in This District
- Enrollment
- 646
- Students per teacher
- 16.6:1
- Resource Index
- 30/100
- Enrollment
- 506
- Students per teacher
- 18.7:1
- Resource Index
- 26/100
- Enrollment
- 493
- Students per teacher
- 24.6:1
- Resource Index
- 11/100
- Enrollment
- 369
- Students per teacher
- 10.9:1
- Resource Index
- 29/100
- Enrollment
- 322
- Students per teacher
- 14.6:1
- Resource Index
- 24/100
Similar other schools in Warren
3 comparable other schools (grades Mixed) serving the same city.
Similar other 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 (~148 students)
Similar student-teacher ratio (~14.8:1)
Next steps
Verify locally before acting on Academy 21's federal record.
- Compare Academy 21 against another school. Compare schools
- Center Line Public 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 Academy 21
How many students attend Academy 21?
Academy 21 has 148 students enrolled. It is a public school in Warren, MI.
What is the student-teacher ratio at Academy 21?
The student-teacher ratio at Academy 21 is 14.8:1, which is 15% lower than the Michigan average of 17.5:1 and 6% lower than the national average of 15.7:1. Lower ratios generally mean more individual attention per student.
What percentage of students receive free lunch at Academy 21?
74.1% of students at Academy 21 are eligible for free lunch, compared to the Michigan average of 54.3%.
What is the racial and ethnic makeup of Academy 21?
The largest demographic group at Academy 21 is White at 43.9% of enrollment, in Warren, MI. Its student body is more racially and ethnically mixed than most US schools, with a diversity index of 67.3/100.
What is the Resource Investment Index for Academy 21?
Academy 21 has a Resource Investment Index of 28/100 (lower reported resources relative to schools nationally) based on 3 factors: student-teacher ratio, AP course offerings, attendance rates. Not a test-score or academic measure (national median ~41/100, see methodology).
How does Academy 21 rank among schools in Warren?
By Resource Investment Index, Academy 21 ranks #2 of 10 schools in Warren, MI. This compares federal resource and staffing data among local peers; it is not a test-score or academic ranking. See all schools in Warren on the city page.
Is Academy 21 a good school?
Academy 21 earns 28/100 on the Resource Investment Index, even as it posts class sizes smaller than 70% of Michigan schools. It is also more racially and ethnically mixed than most 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 Center Line Public Schools?
Besides Academy 21, Center Line Public Schools also operates Center Line High School (646 students), Wolfe Middle School (506 students), and May V Peck Elementary School (493 students). See the Center Line Public 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.