Enrollment
534
Iowa · 2024-25 NCES data
Middle school (grades 6-8) · Marion, IA
Oak Ridge School
Federal NCES profile for Oak Ridge School, including enrollment, faculty, free-lunch eligibility, demographics, and resource indicators - Resource Investment Index 50/100.
2024-25 NCES dataMiddle school (grades 6-8)NCES 191722000810
👥 S:T ratio 44
🌟 Gifted program 70
🎓 Counselors 47
📋 Attendance 40
Scored 0–100 from federal NCES and CRDC indicators, resource allocation, not test scores. Full methodology →
The verdict
Oak Ridge School earns 50/100 on the Resource Investment Index, with class sizes near the Iowa median.
- #2 of 15
- public schools in Marion · Resource Index
- 50
- Resource Index · Higher
- 14.1:1
- students per teacher
- 15.6%
- free-lunch eligible
Oak Ridge School has class sizes near the Iowa median. Computed live against every Iowa school reporting to NCES.
By Resource Investment Index, Oak Ridge School ranks #2 of 15 public schools in Marion, IA.
School address
District: Linn-Mar Comm School District · Iowa
NCES ID 191722000810 Verify on NCES CCD record →
Teachers (FTE)
38.0
Federal CCD staff survey
Students per teacher
14.1:1
vs 14.8:1 Iowa avg
-5% vs state
Free-lunch eligible
15.6%
vs 36.4% Iowa avg
-57% vs state
Student-teacher ratio in context
How Oak Ridge School compares with Iowa and U.S. medians
What stands out at Oak Ridge School
Oak Ridge School is a lower-poverty, mid-sized middle school in Marion, Iowa, enrolling 534 students.
At 14.1:1, its student-teacher ratio sits close to the Iowa median, within a few percentage points of the 14.8:1 state norm, neither notably crowded nor notably small.
Comparatively few students face economic hardship here, 15.6% free-meal eligibility runs 57% below the Iowa average.
Enrollment of 534 puts it in the larger third of Iowa schools by headcount.
Its Resource Investment Index sits near the middle of the pack among 1,322 scored Iowa schools.
Against 221 statewide peers matched on enrollment and economic need, it ranks in the upper tier at #55.
Its student body is led by White (69%) and Asian (14%) (diversity index 50/100).
Counselor coverage runs a bit thin, about 267 students per counselor, somewhat past the ASCA-recommended 250:1 benchmark.
Attendance runs somewhat below the norm, with 24.0% of students chronically absent per the 2021-22 civil-rights collection.
Among Marion's middle schools, it stands alongside Excelsior Middle School (594 students): Oak Ridge School is smaller than that campus by headcount and runs heavier classes (14.1:1 vs 12.9:1).
Linn-Mar Comm School District also operates Linn-Mar High School (2,229 students) and Boulder Peak Intermediate School (613 students) alongside Oak Ridge 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 Oak Ridge School compares
Oak Ridge School on the metrics families compare, against Iowa and U.S. means.
| Metric | This school | vs Iowa | Iowa avg | U.S. avg |
|---|---|---|---|---|
| Students per teacher | 14.1:1 | ▼ 5% | 14.8:1 | 15.7:1 |
| Free-lunch eligible | 15.6% | ▼ 57% | 36.4% | 51.7% |
| Enrollment | 534 | top 17% | - | - |
Source: NCES Common Core of Data School-level CCD + state/national means from Public School Universe · 2024-25
14.1:1
Leaner classes than 56% of US schools, a middle-of-the-pack class size.
534
Bigger than 66% of US schools by enrollment, mid-sized for the country.
Equity indicators (what these measure)
Economic need
15.6%
free-lunch eligible
- 57% below the Iowa average of 36.4%
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
14.1:1
students per teacher
- 5% below state mean
Top 52% in Iowa - lower ratio than 48% of state schools
Close to the 15:1 benchmark most often cited for individualized attention.
Engagement
24.0%
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
$12,349
per pupil, district-wide
- below Iowa avg of $12,854
Well below the U.S. average per-pupil spend, a notably leaner funding position that may affect programs, facilities, and staffing.
Support staff
Counselors2.0 FTE
Per 267 students, the combined health-and-guidance staffing load for this school.
Discipline context
17
in-school suspensions + 31 out-of-school
Suspension rate: 3.2 per 100 students. Combined in-school and out-of-school rate: 9.0 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 68.9%
Asian 14.1%
Hispanic or Latino 6.6%
African American 5.3%
Two or More 5.1%
Native Hawaiian / Pacific Islander 0.2%
Largest group: White at 68.9% of enrollment.
Student-body diversity index 49.6/100
Simpson diversity index - at 49.6, Oak Ridge School is more mixed than the Iowa school average of 33.8.
Programs
Gifted & talented Yes
Funding & spending
District-wide per-pupil expenditure for Linn-Mar Comm School District, which includes Oak Ridge School.
$12,349
Per student
-4%
vs Iowa
Avg $12,854
-26%
vs U.S.
Avg $16,593
Revenue mix
Local 41.3%
State 50.8%
Federal 7.9%
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 Oak Ridge School Compares to District-Mates
| School | Enrollment | Economic Profile | Student-Teacher Ratio |
|---|---|---|---|
| Linn-Mar High School | Larger | Similar economic need | Higher S:T ratio |
| Boulder Peak Intermediate School | Similar size | Similar economic need | Higher S:T ratio |
| Excelsior Middle School | Similar size | Similar economic need | Similar S:T ratio |
| Hazel Point Intermediate School | Similar size | Similar economic need | Similar S:T ratio |
| Echo Hill Elementary | Similar size | Similar economic need | Higher S:T ratio |
Comparisons are relative to Oak Ridge School's own figures; each column derives from NCES Common Core of Data.
Other Schools in This District
- Enrollment
- 2,229
- Students per teacher
- 17.1:1
- Resource Index
- 40/100
- Enrollment
- 613
- Students per teacher
- 15.7:1
- Resource Index
- 48/100
- Enrollment
- 594
- Students per teacher
- 12.9:1
- Resource Index
- 46/100
- Enrollment
- 563
- Students per teacher
- 14.8:1
- Resource Index
- 42/100
- Enrollment
- 536
- Students per teacher
- 15.8:1
- Resource Index
- 45/100
Similar middle schools in Marion
1 comparable middle schools (grades 6-8) serving the same city.
Similar middle schools statewide
Matched by enrollment size and by staffing ratio across all of Iowa, not just this city - a different peer set than the local comparisons above.
Similar enrollment (~534 students)
Similar student-teacher ratio (~14.1:1)
Next steps
Verify locally before acting on Oak Ridge School's federal record.
- Compare Oak Ridge School against another school. Compare schools
- Linn-Mar Comm School District'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 Oak Ridge School
How many students attend Oak Ridge School?
Oak Ridge School has 534 students enrolled. It is a middle school in Marion, IA.
What is the student-teacher ratio at Oak Ridge School?
The student-teacher ratio at Oak Ridge School is 14.1:1, which is 5% lower than the Iowa average of 14.8:1 and 10% 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 Oak Ridge School?
15.6% of students at Oak Ridge School are eligible for free lunch, compared to the Iowa average of 36.4%.
What is the racial and ethnic makeup of Oak Ridge School?
The largest demographic group at Oak Ridge School is White at 68.9% of enrollment, in Marion, IA.
What is the Resource Investment Index for Oak Ridge School?
Oak Ridge School has a Resource Investment Index of 50/100 (higher 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 Oak Ridge School rank among public schools in Marion?
By Resource Investment Index, Oak Ridge School ranks #2 of 15 public schools in Marion, IA. This compares federal resource and staffing data among local peers; it is not a test-score or academic ranking. See all public schools in Marion on the city page.
Is Oak Ridge School a good school?
Oak Ridge School earns 50/100 on the Resource Investment Index, with class sizes near the Iowa median. 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 Linn-Mar Comm School District?
Besides Oak Ridge School, Linn-Mar Comm School District also operates Linn-Mar High School (2,229 students), Boulder Peak Intermediate School (613 students), and Excelsior Middle School (594 students). See the Linn-Mar Comm School District 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.