- Enrollment
- 646
- Students per teacher
- 16.6:1
- Resource Index
- 30/100
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 →
CCD year-over-year · 2022-23 → 2023-24
-23 students YoY
Academy 21 shrank from 197 students in 2022-23 to 174 in 2023-24 (-11.7%).
Teacher FTE added 10.0 → 11.6 across the same CCD years.
Source: NCES Common Core of Data public-school universe (2022-23, 2023-24).
Shrinking CCD campus
-23 students YoY 260858008255 · Warren, MI Other · SMALL · TRAD
148 enr · 14.8:1 · 74.1% lunch · RII 28
Nearest enrollment peer: Center Line High School (646 students)
Academy 21 shrank from 197 students in 2022-23 to 174 in 2023-24 (-11.7%). Teacher FTE added 10.0 → 11.6 across the same CCD years. Read with this school → · District book → · Michigan schools → · Find another →
Academy 21 in the enrollment neighbourhood
Fall enrollment among this campus and nearest district peers
- Center Line Hi
Center Line High School
646 students
- Wolfe Middle S
Wolfe Middle School
506 students
- May V Peck Ele
May V Peck Elementary School
493 students
- Mark C Roose E
Mark C Roose Elementary School
369 students
- Crothers Eleme
Crothers Elementary School
322 students
- This school 148
Academy 21
148 students
What this shows Academy 21 reports 148 students on the CCD universe file.
How Academy 21 compares
Academy 21 is a shrinking campus on CCD: ratios and free-lunch share vs 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 methodology
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
$16,275
per pupil, district-wide
- above Michigan avg of $15,012
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.
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
District finance for Center Line Public Schools reports $16,275 per pupil (NCES F-33) - open the district page for the full revenue mix.
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
- 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.
Nationwide other schools with similar size or staffing
Out-of-state peers matched by enrollment and by student-teacher ratio, not the same-city or same-district lists above.
Similar enrollment (~148 students)
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. CCD year-over-year: 197 (2022-23) → 174 (2023-24), down 23.
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, gifted-program reporting, chronic absenteeism. 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.
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.