- Enrollment
- 1,696
- Students per teacher
- 15:1
- Resource Index
- 29/100
Elementary school (grades K-5) · Ann Arbor, MI
Ann Arbor Open at Mack School
Federal NCES profile for Ann Arbor Open at Mack School, including enrollment, faculty, free-lunch eligibility, demographics, and resource indicators - Resource Investment Index 29/100.
2024-25 NCES dataElementary school (grades K-5)NCES 260282004006
👥 S:T ratio 38
🌟 Gifted program 30
🎓 Counselors 0
📋 Attendance 47
Scored 0–100 from federal NCES and CRDC indicators, resource allocation, not test scores. Full methodology →
The verdict
Ann Arbor Open at Mack School earns 29/100 on the Resource Investment Index, with class sizes near the Michigan median.
- #16 of 18
- elementary schools in Ann Arbor · Resource Index
- 29
- Resource Index · Lower
- 15.4:1
- students per teacher
- 10.3%
- free-lunch eligible
Ann Arbor Open at Mack School has class sizes near the Michigan median. Computed live against every Michigan school reporting to NCES.
By Resource Investment Index, Ann Arbor Open at Mack School ranks #16 of 18 elementary schools in Ann Arbor, MI.
School address
District: Ann Arbor Public Schools · Michigan
NCES ID 260282004006 Verify on NCES CCD record →
CCD year-over-year · 2022-23 → 2023-24
+24 students YoY
Ann Arbor Open at Mack School held near 541 students from 2022-23 to 2023-24 (+24 headcount).
Teacher FTE added 33.1 → 35.1 across the same CCD years.
Source: NCES Common Core of Data public-school universe (2022-23, 2023-24).
Steady CCD campus
+24 students YoY 260282004006 · Ann Arbor, MI Elementary · MID · TRAD
508 enr · 15.4:1 · 10.3% lunch · RII 29
Nearest enrollment peer: Huron High School (1,696 students)
Ann Arbor Open at Mack School held near 541 students from 2022-23 to 2023-24 (+24 headcount). Teacher FTE added 33.1 → 35.1 across the same CCD years. Read with this school → · District book → · Michigan schools → · Find another →
Ann Arbor Open at Mack School in the enrollment neighbourhood
Fall enrollment among this campus and nearest district peers
- Huron High Sch
Huron High School
1,696 students
- Pioneer High S
Pioneer High School
1,671 students
- Skyline High S
Skyline High School
1,237 students
- Slauson Middle
Slauson Middle School
729 students
- Clague Middle
Clague Middle School
696 students
- This school 508
Ann Arbor Open at Mack School
508 students
What this shows Ann Arbor Open at Mack School reports 508 students on the CCD universe file.
How Ann Arbor Open at Mack School compares
Ann Arbor Open at Mack School held steady on CCD headcount: ratios and free-lunch share vs Michigan and U.S. means.
| Metric | This school | vs Michigan | Michigan avg | U.S. avg |
|---|---|---|---|---|
| Students per teacher | 15.4:1 | ▼ 12% | 17.5:1 | 15.7:1 |
| Free-lunch eligible | 10.3% | ▼ 81% | 54.3% | 51.7% |
| Enrollment | 508 | top 25% | - | - |
Source: NCES Common Core of Data School-level CCD + state/national means from Public School Universe · 2024-25
15.4:1
Leaner classes than 43% of US schools, a middle-of-the-pack class size.
508
Bigger than 63% of US schools by enrollment, mid-sized for the country.
Equity indicators methodology
Economic need
10.3%
free-lunch eligible
- 81% 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
15.4:1
students per teacher
- 12% below state mean
Top 36% in Michigan - lower ratio than 64% of state schools
Close to the 15:1 benchmark most often cited for individualized attention.
Engagement
21.3%
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
$19,271
per pupil, district-wide
- above Michigan avg of $15,012
Somewhat above the U.S. public-school average, reflecting higher local or state investment per enrolled student.
Support staff
Counselors1.0 FTE
Per 508 students, the combined health-and-guidance staffing load for this school.
Discipline context
0
in-school suspensions + 2 out-of-school
Suspension rate: 0.0 per 100 students. Combined in-school and out-of-school rate: 0.4 per 100 students. Reported via the Civil Rights Data Collection.
Student demographics
White 69.9%
Two or More 15.2%
Hispanic or Latino 8.5%
Asian 4.7%
African American 1.8%
Largest group: White at 69.9% of enrollment.
Student-body diversity index 47.9/100
Simpson diversity index - at 47.9, Ann Arbor Open at Mack School is more mixed than the Michigan school average of 36.2.
Programs
District finance for Ann Arbor Public Schools reports $19,271 per pupil (NCES F-33) - open the district page for the full revenue mix.
How Ann Arbor Open at Mack School Compares to District-Mates
| School | Enrollment | Economic Profile | Student-Teacher Ratio |
|---|---|---|---|
| Huron High School | Larger | Higher economic need | Similar S:T ratio |
| Pioneer High School | Larger | Higher economic need | Similar S:T ratio |
| Skyline High School | Larger | Similar economic need | Similar S:T ratio |
| Slauson Middle School | Larger | Similar economic need | Higher S:T ratio |
| Clague Middle School | Larger | Similar economic need | Higher S:T ratio |
Comparisons are relative to Ann Arbor Open at Mack School's own figures; each column derives from NCES Common Core of Data.
Other Schools in This District
- Enrollment
- 1,671
- Students per teacher
- 16.2:1
- Resource Index
- 41/100
- Enrollment
- 1,237
- Students per teacher
- 16.1:1
- Resource Index
- 33/100
- Enrollment
- 729
- Students per teacher
- 19.2:1
- Resource Index
- 31/100
- Enrollment
- 696
- Students per teacher
- 18.3:1
- Resource Index
- 42/100
Similar elementary schools in Ann Arbor
2 comparable elementary schools (grades K-5) serving the same city.
Nationwide elementary 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 (~508 students)
Frequently asked questions about Ann Arbor Open at Mack School
How many students attend Ann Arbor Open at Mack School?
Ann Arbor Open at Mack School has 508 students enrolled. It is an elementary school in Ann Arbor, MI. CCD year-over-year: 517 (2022-23) → 541 (2023-24), nearly flat (+24).
What is the student-teacher ratio at Ann Arbor Open at Mack School?
The student-teacher ratio at Ann Arbor Open at Mack School is 15.4:1, which is 12% lower than the Michigan average of 17.5:1 and 2% 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 Ann Arbor Open at Mack School?
10.3% of students at Ann Arbor Open at Mack School are eligible for free lunch, compared to the Michigan average of 54.3%.
What is the racial and ethnic makeup of Ann Arbor Open at Mack School?
The largest demographic group at Ann Arbor Open at Mack School is White at 69.9% of enrollment, in Ann Arbor, MI.
What is the Resource Investment Index for Ann Arbor Open at Mack School?
Ann Arbor Open at Mack School has a Resource Investment Index of 29/100 (lower reported resources relative to schools nationally) based on 4 factors: student-teacher ratio, gifted-program reporting, counselor availability, chronic absenteeism. Not a test-score or academic measure (national median ~41/100, see methodology).
How does Ann Arbor Open at Mack School rank among elementary schools in Ann Arbor?
By Resource Investment Index, Ann Arbor Open at Mack School ranks #16 of 18 elementary schools in Ann Arbor, MI. This compares federal resource and staffing data among local peers; it is not a test-score or academic ranking. See all elementary schools in Ann Arbor on the city page.
What other schools are in Ann Arbor Public Schools?
Besides Ann Arbor Open at Mack School, Ann Arbor Public Schools also operates Huron High School (1,696 students), Pioneer High School (1,671 students), and Skyline High School (1,237 students). See the Ann Arbor Public Schools district page for the complete list.