Enrollment
351
Illinois · 2024-25 NCES data
Elementary school (grades K-5) · Plano, IL
Centennial Elem School
Federal NCES profile for Centennial Elem School, including enrollment, faculty, free-lunch eligibility, demographics, and resource indicators - Resource Investment Index 34/100.
2024-25 NCES dataElementary school (grades K-5)NCES 173177003340
👥 S:T ratio 44
🌟 Gifted program 30
📋 Attendance 29
Scored 0–100 from federal NCES and CRDC indicators, resource allocation, not test scores. Full methodology →
The verdict
Centennial Elem School earns 34/100 on the Resource Investment Index, with class sizes near the Illinois median. It is also more racially and ethnically mixed than most Illinois schools.
- #3 of 5
- public schools in Plano · Resource Index
- 34
- Resource Index · Typical
- 14:1
- students per teacher
- 351
- students enrolled
Centennial Elem School has class sizes near the Illinois median. Computed live against every Illinois school reporting to NCES.
By Resource Investment Index, Centennial Elem School ranks #3 of 5 public schools in Plano, IL.
School address
Teachers (FTE)
25.0
Federal CCD staff survey
Students per teacher
14:1
vs 14:1 Illinois avg
+0% 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 elementary school in Plano, Illinois, enrolling 351 students.
At 14:1, 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 351 students, its enrollment sits close to the Illinois median campus size.
Its Resource Investment Index lands in the lower third of 3,845 scored Illinois schools.
Its student body is led by Hispanic or Latino (53%) and White (33%), more mixed than most schools in the state (diversity index 60/100).
Chronic absenteeism is elevated: 28.5% of students missed 10% or more of school days (2021-22 Civil Rights Data Collection).
Among Plano's elementary schools, it stands alongside Emily G Johns School (494 students): Centennial Elem School is smaller than that campus by headcount and runs leaner classes (14:1 vs 15.4:1).
Plano Cusd 88 also operates Plano High School (757 students) and Emily G Johns School (494 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 | 14:1 | ▼ 0% | 14:1 | 15.7:1 |
| Enrollment | 351 | top 54% | - | - |
Source: NCES Common Core of Data School-level CCD + state/national means from Public School Universe · 2024-25
14:1
Leaner classes than 57% of US schools, a middle-of-the-pack class size.
351
Bigger than 40% of US schools by enrollment, mid-sized for the country.
Equity indicators (what these measure)
Staffing depth
14:1
students per teacher
- 0% above state mean
Top 56% in Illinois - lower ratio than 44% of state schools
Close to the 15:1 benchmark most often cited for individualized attention.
Engagement
28.5%
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
$15,468
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
Counselors0.0 FTE
Student-support staffing from the Civil Rights Data Collection.
Discipline context
1
in-school suspensions + 1 out-of-school
Suspension rate: 0.3 per 100 students. Combined in-school and out-of-school rate: 0.6 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
Hispanic or Latino 53.3%
White 32.8%
African American 10.0%
Two or More 4.0%
Largest group: Hispanic or Latino at 53.3% of enrollment.
Student-body diversity index 59.7/100
Simpson diversity index - at 59.7, Centennial Elem School is more mixed than the Illinois school average of 38.9.
Programs
Funding & spending
District-wide per-pupil expenditure for Plano Cusd 88, which includes Centennial Elem School.
$15,468
Per student
-9%
vs Illinois
Avg $17,042
-7%
vs U.S.
Avg $16,593
Revenue mix
Local 43.1%
State 49.7%
Federal 7.2%
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 |
|---|---|---|---|
| Plano High School | Larger | No free-lunch data | Similar S:T ratio |
| Emily G Johns School | Larger | No free-lunch data | Similar S:T ratio |
| P H Miller Elem School | Similar size | No free-lunch data | Similar S:T ratio |
| Plano Middle School | Similar size | 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
- 757
- Students per teacher
- 14.3:1
- Resource Index
- 40/100
- Enrollment
- 494
- Students per teacher
- 15.4:1
- Resource Index
- 32/100
- Enrollment
- 438
- Students per teacher
- 13.7:1
- Resource Index
- 34/100
- Enrollment
- 358
- Students per teacher
- 11.9:1
- Resource Index
- 40/100
Similar elementary schools in Plano
1 comparable elementary schools (grades K-5) serving the same city.
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 (~351 students)
Next steps
Verify locally before acting on Centennial Elem School's federal record.
- Compare Centennial Elem School against another school. Compare schools
- Plano Cusd 88'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 351 students enrolled. It is an elementary school in Plano, IL.
What is the student-teacher ratio at Centennial Elem School?
The student-teacher ratio at Centennial Elem School is 14:1, which is 0% higher than the Illinois average of 14:1 and 11% lower 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 Hispanic or Latino at 53.3% of enrollment, in Plano, IL. Its student body is more racially and ethnically mixed than most US schools, with a diversity index of 59.7/100.
What is the Resource Investment Index for Centennial Elem School?
Centennial Elem School has a Resource Investment Index of 34/100 (typical 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 Centennial Elem School rank among public schools in Plano?
By Resource Investment Index, Centennial Elem School ranks #3 of 5 public schools in Plano, 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 Plano on the city page.
Is Centennial Elem School a good school?
Centennial Elem School earns 34/100 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 Plano Cusd 88?
Besides Centennial Elem School, Plano Cusd 88 also operates Plano High School (757 students), Emily G Johns School (494 students), and P H Miller Elem School (438 students). See the Plano Cusd 88 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.