Enrollment
294
Illinois · 2024-25 NCES data
Other / mixed grade configuration · Polo, IL
Centennial Elem School
Federal NCES profile for Centennial Elem School, including enrollment, faculty, free-lunch eligibility, demographics, and resource indicators - Resource Investment Index 47/100.
2024-25 NCES dataOther / mixed grade configurationNCES 173210003358
👥 S:T ratio 35
🌟 Gifted program 30
🎓 Counselors 41
📋 Attendance 83
Scored 0–100 from federal NCES and CRDC indicators, resource allocation, not test scores. Full methodology →
The verdict
Centennial Elem School earns 47/100 on the Resource Investment Index, with class sizes larger than 82% of Illinois schools.
- #3 of 3
- public schools in Polo · Resource Index
- 47
- Resource Index · Typical
- 16.3:1
- large classes for Illinois
- 294
- students enrolled
Centennial Elem School has class sizes larger than 82% of Illinois schools. Computed live against every Illinois school reporting to NCES.
By Resource Investment Index, Centennial Elem School ranks #3 of 3 public schools in Polo, IL.
School address
Teachers (FTE)
18.0
Federal CCD staff survey
Students per teacher
16.3:1
vs 14:1 Illinois avg
+16% vs state
Student-teacher ratio in context
How Centennial Elem School compares with Illinois and U.S. medians
What stands out at Centennial Elem School
Centennial Elem School is a mid-sized combined-grade school in Polo, Illinois, enrolling 294 students.
Class loads run somewhat heavier than typical: 16.3:1 puts it in the larger third of Illinois schools by student-teacher ratio.
With 294 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 predominantly White (91% of enrollment) (diversity index 18/100).
Counselor coverage runs a bit thin, about 294 students per counselor, somewhat past the ASCA-recommended 250:1 benchmark.
Attendance holds up well here: only 6.8% of students were chronically absent, below the typical post-pandemic national figure.
Polo Cusd 222 also operates Polo Comm High School (186 students) and Aplington Middle School (114 students) alongside Centennial Elem 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 Centennial Elem School compares
Centennial 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 | 16.3:1 | ▲ 16% | 14:1 | 15.7:1 |
| Enrollment | 294 | top 65% | - | - |
Source: NCES Common Core of Data School-level CCD + state/national means from Public School Universe · 2024-25
16.3:1
Leaner classes than 36% of US schools, a middle-of-the-pack class size.
294
Bigger than 31% of US schools by enrollment, mid-sized for the country.
Equity indicators (what these measure)
Staffing depth
16.3:1
students per teacher
- 16% above state mean
Top 82% in Illinois - lower ratio than 18% of state schools
Between 16:1 and 20:1, squarely in the typical U.S. public-school staffing range.
Engagement
6.8%
chronically absent (missed 10%+ of school days)
In the 5-10% range, close to the pre-pandemic national baseline.
Funding equity
$14,573
per pupil, district-wide
- below Illinois avg of $17,042
Somewhat below the U.S. average per-pupil spend; funding constraints may affect programs, facilities, and staffing.
Support staff
Counselors1.0 FTE
Per 294 students, the combined health-and-guidance staffing load for this school.
Discipline context
13
in-school suspensions + 3 out-of-school
Suspension rate: 4.4 per 100 students. Combined in-school and out-of-school rate: 5.4 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 90.5%
Hispanic or Latino 6.8%
Two or More 2.4%
African American 0.3%
Largest group: White at 90.5% of enrollment.
Student-body diversity index 17.6/100
Simpson diversity index - at 17.6, Centennial Elem School is less mixed than the Illinois school average of 38.9.
Programs
Funding & spending
District-wide per-pupil expenditure for Polo Cusd 222, which includes Centennial Elem School.
$14,573
Per student
-14%
vs Illinois
Avg $17,042
-12%
vs U.S.
Avg $16,593
Revenue mix
Local 52.9%
State 34.7%
Federal 12.4%
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 Centennial Elem School Compares to District-Mates
| School | Enrollment | Economic Profile | Student-Teacher Ratio |
|---|---|---|---|
| Polo Comm High School | Smaller | No free-lunch data | Lower S:T ratio |
| Aplington Middle School | Smaller | No free-lunch data | Lower S:T ratio |
Comparisons are relative to Centennial Elem School's own figures; each column derives from NCES Common Core of Data.
Other Schools in This District
- Enrollment
- 186
- Students per teacher
- 12.4:1
- Resource Index
- 53/100
- Enrollment
- 114
- Students per teacher
- 12.7:1
- Resource Index
- 58/100
Similar other 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 (~294 students)
Similar student-teacher ratio (~16.3:1)
Next steps
Verify locally before acting on Centennial Elem School's federal record.
- Compare Centennial Elem School against another school. Compare schools
- Polo Cusd 222'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 Centennial Elem School
How many students attend Centennial Elem School?
Centennial Elem School has 294 students enrolled. It is a public school in Polo, IL.
What is the student-teacher ratio at Centennial Elem School?
The student-teacher ratio at Centennial Elem School is 16.3:1, which is 16% higher than the Illinois average of 14:1 and 4% higher than the national average of 15.7:1.
What is the racial and ethnic makeup of Centennial Elem School?
The largest demographic group at Centennial Elem School is White at 90.5% of enrollment, in Polo, IL.
What is the Resource Investment Index for Centennial Elem School?
Centennial Elem School has a Resource Investment Index of 47/100 (typical 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 Centennial Elem School rank among public schools in Polo?
By Resource Investment Index, Centennial Elem School ranks #3 of 3 public schools in Polo, 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 Polo on the city page.
Is Centennial Elem School a good school?
Centennial Elem School earns 47/100 on the Resource Investment Index, with class sizes larger than 82% of 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 Polo Cusd 222?
Besides Centennial Elem School, Polo Cusd 222 also operates Polo Comm High School (186 students) and Aplington Middle School (114 students). See the Polo Cusd 222 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.