Enrollment
232
Illinois · 2024-25 NCES data
Elementary school (grades K-5) · Oak Forest, IL
Arbor Elementary School
Federal NCES profile for Arbor Elementary School, including enrollment, faculty, free-lunch eligibility, demographics, and resource indicators - Resource Investment Index 56/100.
2024-25 NCES dataElementary school (grades K-5)NCES 170393000080
👥 S:T ratio 48
🌟 Gifted program 70
📋 Attendance 51
Scored 0–100 from federal NCES and CRDC indicators, resource allocation, not test scores. Full methodology →
The verdict
Arbor Elementary School earns 56/100 on the Resource Investment Index, with class sizes near the Illinois median. It is also more racially and ethnically mixed than most Illinois schools.
- #2 of 5
- elementary schools in Oak Forest · Resource Index
- 56
- Resource Index · Higher
- 12.9:1
- students per teacher
- 232
- students enrolled
Arbor Elementary School has class sizes near the Illinois median. Computed live against every Illinois school reporting to NCES.
By Resource Investment Index, Arbor Elementary School ranks #2 of 5 elementary schools in Oak Forest, IL.
School address
District: Arbor Park Sd 145 · Illinois
NCES ID 170393000080 Verify on NCES CCD record →
Teachers (FTE)
18.0
Federal CCD staff survey
Students per teacher
12.9:1
vs 14:1 Illinois avg
-8% vs state
Student-teacher ratio in context
How Arbor Elementary School compares with Illinois and U.S. medians
What stands out at Arbor Elementary School
Arbor Elementary School is a mid-sized elementary school in Oak Forest, Illinois, enrolling 232 students.
At 12.9:1, its student-teacher ratio sits close to the Illinois median, within a few percentage points of the 14:1 state norm, neither notably crowded nor notably small.
Enrollment of 232 puts it in the smaller third of Illinois schools by headcount.
Its Resource Investment Index lands in the upper third of 3,845 scored Illinois schools.
Its student body is led by White (39%) and Hispanic or Latino (29%), more mixed than most schools in the state (diversity index 71/100).
Attendance runs somewhat below the norm, with 19.8% of students chronically absent per the 2021-22 civil-rights collection.
Among Oak Forest's elementary schools, it stands alongside Arbor Park Middle School (520 students): Arbor Elementary School is smaller than that campus by headcount and runs leaner classes (12.9:1 vs 13:1).
Arbor Park Sd 145 also operates Arbor Park Middle School (520 students) and Scarlet Oak Elementary School (249 students) alongside Arbor Elementary 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 Arbor Elementary School compares
Arbor Elementary School on the metrics families compare, against Illinois and U.S. means.
| Metric | This school | vs Illinois | Illinois avg | U.S. avg |
|---|---|---|---|---|
| Students per teacher | 12.9:1 | ▼ 8% | 14:1 | 15.7:1 |
| Enrollment | 232 | top 77% | - | - |
Source: NCES Common Core of Data School-level CCD + state/national means from Public School Universe · 2024-25
12.9:1
Leaner classes than 68% of US schools, among the more generously staffed nationally.
232
Bigger than 23% of US schools by enrollment, mid-sized for the country.
Equity indicators (what these measure)
Staffing depth
12.9:1
students per teacher
- 8% below state mean
Top 41% in Illinois - lower ratio than 59% of state schools
Well under the widely cited 15:1 individualized-attention benchmark, among the leaner class loads nationally.
Engagement
19.8%
chronically absent (missed 10%+ of school days)
In the 15-20% range, nearing the "high" absenteeism threshold.
Funding equity
$18,367
per pupil, district-wide
- above Illinois avg of $17,042
Somewhat above the U.S. public-school average, reflecting higher local or state investment per enrolled student.
Support staff
Counselors0.0 FTE
Student-support staffing from the Civil Rights Data Collection.
Discipline context
0
in-school suspensions + 3 out-of-school
Suspension rate: 0.0 per 100 students. Combined in-school and out-of-school rate: 1.3 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 39.2%
Hispanic or Latino 29.3%
Asian 18.1%
African American 11.6%
Two or More 1.7%
Largest group: White at 39.2% of enrollment.
Student-body diversity index 71.4/100
Simpson diversity index - at 71.4, Arbor Elementary School is more mixed than the Illinois school average of 38.9.
Programs
Gifted & talented Yes
Funding & spending
District-wide per-pupil expenditure for Arbor Park Sd 145, which includes Arbor Elementary School.
$18,367
Per student
+8%
vs Illinois
Avg $17,042
+11%
vs U.S.
Avg $16,593
Revenue mix
Local 47.1%
State 44.3%
Federal 8.6%
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 Arbor Elementary School Compares to District-Mates
| School | Enrollment | Economic Profile | Student-Teacher Ratio |
|---|---|---|---|
| Arbor Park Middle School | Larger | No free-lunch data | Similar S:T ratio |
| Scarlet Oak Elementary School | Similar size | No free-lunch data | Similar S:T ratio |
| Kimberly Heights Elem School | Similar size | No free-lunch data | Higher S:T ratio |
Comparisons are relative to Arbor Elementary School's own figures; each column derives from NCES Common Core of Data.
Other Schools in This District
- Enrollment
- 520
- Students per teacher
- 13:1
- Resource Index
- 42/100
- Enrollment
- 249
- Students per teacher
- 13.8:1
- Resource Index
- 57/100
- Enrollment
- 181
- Students per teacher
- 16.5:1
- Resource Index
- 39/100
Similar elementary schools in Oak Forest
4 comparable elementary schools (grades K-5) serving the same city.
Arbor Park Middle School
Standard public school
520 students 13:1 students per teacher
Kerkstra Elem School
Standard public school
407 students 14:1 students per teacher
Lee R Foster Elem School
Standard public school
397 students 15.3:1 students per teacher
Scarlet Oak Elementary School
Standard public school
249 students 13.8:1 students per teacher
Similar elementary schools statewide
Matched by enrollment size and by staffing ratio across all of Illinois, not just this city - a different peer set than the local comparisons above.
Similar enrollment (~232 students)
Similar student-teacher ratio (~12.9:1)
Next steps
Verify locally before acting on Arbor Elementary School's federal record.
- Compare Arbor Elementary School against another school. Compare schools
- Arbor Park Sd 145'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 Arbor Elementary School
How many students attend Arbor Elementary School?
Arbor Elementary School has 232 students enrolled. It is an elementary school in Oak Forest, IL.
What is the student-teacher ratio at Arbor Elementary School?
The student-teacher ratio at Arbor Elementary School is 12.9:1, which is 8% lower than the Illinois average of 14:1 and 18% lower than the national average of 15.7:1. Lower ratios generally mean more individual attention per student.
What is the racial and ethnic makeup of Arbor Elementary School?
The largest demographic group at Arbor Elementary School is White at 39.2% of enrollment, in Oak Forest, IL. Its student body is more racially and ethnically mixed than most US schools, with a diversity index of 71.4/100.
What is the Resource Investment Index for Arbor Elementary School?
Arbor Elementary School has a Resource Investment Index of 56/100 (higher reported resources relative to schools nationally) based on 3 factors: student-teacher ratio, attendance rates. Not a test-score or academic measure (national median ~41/100, see methodology).
How does Arbor Elementary School rank among elementary schools in Oak Forest?
By Resource Investment Index, Arbor Elementary School ranks #2 of 5 elementary schools in Oak Forest, IL. This compares federal resource and staffing data among local peers; it is not a test-score or academic ranking. See all elementary schools in Oak Forest on the city page.
Is Arbor Elementary School a good school?
Arbor Elementary School earns 56/100 on the Resource Investment Index, with class sizes near the Illinois median. It is also more racially and ethnically mixed than most Illinois 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 Arbor Park Sd 145?
Besides Arbor Elementary School, Arbor Park Sd 145 also operates Arbor Park Middle School (520 students), Scarlet Oak Elementary School (249 students), and Kimberly Heights Elem School (181 students). See the Arbor Park Sd 145 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.