Enrollment
508
Michigan · 2024-25 NCES data
2024-25 NCES data Elementary school (grades K-5) NCES 260282004006
Ann Arbor Open at Mack School — Ann Arbor, MI
Federal NCES profile for Ann Arbor Open at Mack School, including enrollment, faculty, free-lunch eligibility, demographics, and resource indicators — Resource Investment Index 28/100.
👥 Class size 37
🌟 Gifted program 30
🎓 Counselors 0
📋 Attendance 47
How this works: Each indicator above is scored 0–100 from federal NCES and CRDC data, then averaged into the Resource Investment Index. This measures resource allocation — staffing, programs, and support services — not standardized test scores or academic outcomes. Full methodology →
School address
District: Ann Arbor Public Schools · Michigan
Public location data per NCES (National Center for Education Statistics) Common Core of Data. Verify the school's current address on the NCES CCD record.
Teachers (FTE)
33.0
Federal CCD staff survey
Students per teacher
15.7:1
vs 18.2:1 Michigan avg
-14% vs state
Free-lunch eligible
10.3%
vs 54.3% Michigan avg
-81% vs state
Student-teacher ratio in context
How Ann Arbor Open at Mack School compares with Michigan and U.S. medians
The federal record — no proprietary index, no editorial formula.
PlainSchools publishes the actual federal measurements — enrollment, staffing, demographics, discipline, and finance — straight from the NCES Common Core of Data, CRDC, and F-33 surveys. No composite rating, no opinion-based score on top. You get the same raw numbers researchers and policymakers use, with benchmarks, spending context, and equity indicators computed from the same federal datasets. Full methodology linked below.
What this school's NCES data tells you
Ann Arbor Open at Mack School reports 508 enrolled students to the National Center for Education Statistics (NCES) alongside 33.0 full-time-equivalent teachers, producing a 15.7:1 student-teacher ratio. That figure sits 14% below the Michigan state mean of 18.2:1, signalling more teacher attention per pupil than the state benchmark. Against the national 2024-25 average of 15.9:1, it is 1% lower, a useful calibration for families comparing districts across state lines.
Title I and federal lunch eligibility offer another window into the student body: 10.3% of pupils qualify for free meals, a proxy for household income that federal programs use to direct funding. The free-lunch share is 81% below the Michigan average and 80% below the national baseline. Counselor coverage works out to roughly 508 students per counselor, above the ASCA-recommended ceiling of 250:1. Chronic absenteeism — missing 10% or more of school days — stands at 21.3% according to the 2021-22 Civil Rights Data Collection.
On the finance side, the surrounding Ann Arbor Public Schools spends $22,548 per pupil district-wide, above the Michigan average of $15,842 and above the national average of $19,490. Revenue comes 56.1% from local sources (property taxes), 34.4% from the state, and 9.5% from federal programs per the NCES F-33 finance survey. Taken together, these measurements produce a Resource Investment Index of 28/100 (F), calculated from 4 distinct NCES and CRDC indicators measuring resource allocation rather than academic outcomes.
Source: National Center for Education Statistics Common Core of Data + CRDC + F-33 · 2024-25
How Ann Arbor Open at Mack School compares
Cross-validating school-level NCES values against Michigan state and U.S. national means lets readers see whether this school is an outlier or in line with peers.
| Metric | This school | vs Michigan | Michigan avg | U.S. avg |
|---|---|---|---|---|
| Students per teacher | 15.7:1 | ▼ 14% | 18.2:1 | 15.9:1 |
| Free-lunch eligible | 10.3% | ▼ 81% | 54.3% | 51.8% |
| Enrollment | 508 | top 75% | — | — |
Source: NCES Common Core of Data School-level CCD + state/national means from Public School Universe · 2024-25
What the federal data reveals about equity at this school
Federal measurements — not ratings — surface the resource and opportunity picture. Below are the indicators that researchers, civil-rights monitors, and funding formulas use to assess equity.
Economic need
10.3%
free-lunch eligible
— 81% below the Michigan average of 54.3%
Below the 40% Title I threshold — federal aid targets individual qualifying students rather than schoolwide programs.
Staffing depth
15.7:1
students per teacher
— 14% below state mean
Top 35% in Michigan — lower ratio than 65% of state schools
Between 15:1 and 20:1 — in line with the typical U.S. public-school staffing range.
Engagement
21.3%
chronically absent (missed 10%+ of school days)
Chronic absenteeism at or above 20% — the CDC threshold for "high" — signals significant barriers to regular attendance.
Funding equity
$22,548
per pupil, district-wide
— above Michigan avg of $15,842
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.
Overview
Enrollment 508 Top 75% in Michigan — larger than 25% of 3,399 state schools
Teachers (FTE) 33.0
Students per teacher 15.7:1 -14% vs state
Free-lunch eligible 10.3% -81% vs state
NCES ID 260282004006
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.
Programs & staff
Counselors (FTE) 1.0
Students per counselor 508:1
Discipline & special education
Chronically absent 21.3%
In-school suspensions 0
Out-of-school suspensions 2
Funding & spending
District-wide per-pupil expenditure for Ann Arbor Public Schools, which includes Ann Arbor Open at Mack School.
$22,548
Per student
+42%
vs Michigan
Avg $15,842
+16%
vs U.S.
Avg $19,490
Revenue mix
Local 56.1%
State 34.4%
Federal 9.5%
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.
Other Schools in This District
- Enrollment
- 1,696
- Students per teacher
- 14.5:1
- Enrollment
- 1,671
- Students per teacher
- 16.5:1
- Enrollment
- 1,237
- Students per teacher
- 17.1:1
- Enrollment
- 729
- Students per teacher
- 19.4:1
- Enrollment
- 696
- Students per teacher
- 18.9:1
Similar elementary schools in Ann Arbor
6 comparable elementary schools (grades K-5) serving the same city.
Ann Arbor Steam at Northside School
Standard public school
614 students 14.3:1 students per teacher
Martin Luther King Elem School
Standard public school
511 students 17.5:1 students per teacher
Thurston Elementary School
Standard public school
506 students 14.6:1 students per teacher
Burns Park Elementary School
Standard public school
477 students 15.2:1 students per teacher
Uriah H Lawton School
Standard public school
422 students 14.1:1 students per teacher
John Allen School
Standard public school
401 students 12.7:1 students per teacher
Educator & family resources
In-depth guides on understanding NCES data, school choice, and education funding.
Understanding NCES data
How CCD, CRDC and EDFacts feed every public-school number you see.
Choose a school district
Eight signals that matter more than the overall ranking number.
How schools are funded
Title I, F-33, state aid formulas and what per-pupil spending really means.
Chronic absenteeism
Why missing 10% of school matters and how it varies by district.
Magnet vs charter vs traditional
Three school types, three funding models, three sets of trade-offs.
School discipline data
What CRDC suspension and expulsion records do and don't reveal.
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 a elementary school in ANN ARBOR, MI.
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 15.7:1, which is 14% lower than the Michigan average of 18.2:1 and 1% lower than the national average of 15.9:1. 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%. The school serves a diverse student body 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 28/100 (F) based on 4 factors: student-teacher ratio, counselor availability, attendance rates. This index measures federal resource allocation — staffing levels, program availability, and support services — not standardized test scores or academic outcomes.