Enrollment
419
Illinois · 2024-25 NCES data
Other / mixed grade configuration · Norridge, IL
Federal NCES profile for Pennoyer Elem School, including enrollment, faculty, free-lunch eligibility, demographics, and resource indicators - Resource Investment Index 50/100.
The verdict
Pennoyer Elem School earns 50/100 on the Resource Investment Index, with class sizes near the Illinois median.
Pennoyer Elem School has class sizes near the Illinois median. Computed live against every Illinois school reporting to NCES.
By Resource Investment Index, Pennoyer Elem School ranks #1 of 4 public schools in Norridge, IL.
NCES ID 173120003250 Verify on NCES CCD record →
Enrollment
419
Illinois · 2024-25 NCES data
Teachers (FTE)
31.0
Federal CCD staff survey
Students per teacher
13.5:1
vs 14:1 Illinois avg
-4% vs state
How Pennoyer Elem School compares with Illinois and U.S. medians
Pennoyer Elem School is a mid-sized combined-grade school in Norridge, Illinois, enrolling 419 students.
At 13.5:1, 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.
With 419 students, its enrollment sits close to the Illinois median campus size.
Its Resource Investment Index lands in the upper third of 3,845 scored Illinois schools.
Its student body is led by White (66%) and Hispanic or Latino (19%) (diversity index 51/100).
10.3% of students were chronically absent in the 2021-22 collection, in line with the post-pandemic national range.
Among Norridge's public schools, it stands alongside J Leigh Elem School (612 students): Pennoyer Elem School is smaller than that campus by headcount and runs leaner classes (13.5:1 vs 14.9:1).
Pennoyer Sd 79 operates only this one school, so Pennoyer Elem School has no district-mates to compare against locally.
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
Pennoyer Elem 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 | 13.5:1 | ▼ 4% | 14:1 | 15.7:1 |
| Enrollment | 419 | top 42% | - | - |
Source: NCES Common Core of Data School-level CCD + state/national means from Public School Universe · 2024-25
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.
Largest group: White at 66.3% of enrollment.
Simpson diversity index - at 51.4, Pennoyer Elem School is more mixed than the Illinois school average of 38.9.
District-wide per-pupil expenditure for Pennoyer Sd 79, which includes Pennoyer Elem School.
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.
1 comparable other schools (grades Mixed) serving the same city.
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.
Next steps
Verify locally before acting on Pennoyer Elem School's federal record.
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.
Pennoyer Elem School has 419 students enrolled. It is a public school in Norridge, IL.
The student-teacher ratio at Pennoyer Elem School is 13.5:1, which is 4% lower than the Illinois average of 14:1 and 14% lower than the national average of 15.7:1. Lower ratios generally mean more individual attention per student.
The largest demographic group at Pennoyer Elem School is White at 66.3% of enrollment, in Norridge, IL. Its student body is more racially and ethnically mixed than most US schools, with a diversity index of 51.4/100.
Pennoyer Elem School has a Resource Investment Index of 50/100 (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).
By Resource Investment Index, Pennoyer Elem School ranks #1 of 4 public schools in Norridge, IL. This compares federal resource and staffing data among local peers; it is not a test-score or academic ranking. See all public schools in Norridge on the city page.
Pennoyer Elem School earns 50/100 on the Resource Investment Index, with class sizes near the Illinois 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.
None reported; Pennoyer Sd 79 operates only Pennoyer Elem School as a public school district in NCES's records.
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.