Enrollment
591
Illinois · 2024-25 NCES data
Elementary school (grades K-5) · Lemont, IL
Central School
Federal NCES profile for Central School, including enrollment, faculty, free-lunch eligibility, demographics, and resource indicators - Resource Investment Index 32/100.
2024-25 NCES dataElementary school (grades K-5)NCES 170729006891
👥 S:T ratio 32
Scored 0–100 from federal NCES and CRDC indicators, resource allocation, not test scores. Full methodology →
The verdict
Central School earns 32/100 on the Resource Investment Index, with class sizes larger than 87% of Illinois schools.
- #5 of 5
- public schools in Lemont · Resource Index
- 32
- Resource Index · Typical
- 16.9:1
- large classes for Illinois
- 591
- students enrolled
Central School has class sizes larger than 87% of Illinois schools. Computed live against every Illinois school reporting to NCES.
By Resource Investment Index, Central School ranks #5 of 5 public schools in Lemont, IL.
School address
District: Lemont-Bromberek Csd 113a · Illinois
NCES ID 170729006891 Verify on NCES CCD record →
Teachers (FTE)
35.0
Federal CCD staff survey
Students per teacher
16.9:1
vs 14:1 Illinois avg
+21% vs state
Student-teacher ratio in context
How Central School compares with Illinois and U.S. medians
What stands out at Central School
Central School is a mid-sized elementary school in Lemont, Illinois, enrolling 591 students.
Class loads run heavy: 16.9:1 is larger than about 87% of Illinois schools and 21% above the 14:1 state mean, so each teacher carries more students than is typical.
Enrollment of 591 puts it in the larger third of Illinois schools by headcount.
Its Resource Investment Index lands in the lower third of 3,845 scored Illinois schools.
Its student body is predominantly White (82% of enrollment) (diversity index 32/100).
The surrounding Lemont-Bromberek Csd 113a spends $13,459 per pupil, 21% below the Illinois average, a leaner-resourced district than most.
Among Lemont's elementary schools, it stands alongside River Valley School (588 students): Central School is larger than that campus by headcount and runs heavier classes (16.9:1 vs 15.5:1).
Lemont-Bromberek Csd 113a also operates Old Quarry Middle Sch (856 students) and Oakwood School (629 students) alongside Central 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 Central School compares
Central 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 | 16.9:1 | ▲ 21% | 14:1 | 15.7:1 |
| Enrollment | 591 | top 21% | - | - |
Source: NCES Common Core of Data School-level CCD + state/national means from Public School Universe · 2024-25
16.9:1
Leaner classes than 31% of US schools, heavier class loads than most.
591
Bigger than 72% of US schools by enrollment, mid-sized for the country.
Equity indicators (what these measure)
Staffing depth
16.9:1
students per teacher
- 21% above state mean
Top 87% in Illinois - lower ratio than 13% of state schools
Between 16:1 and 20:1, squarely in the typical U.S. public-school staffing range.
Funding equity
$13,459
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.
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 81.7%
Hispanic or Latino 10.3%
Asian 3.7%
Two or More 2.7%
African American 1.2%
American Indian / Alaska Native 0.2%
Native Hawaiian / Pacific Islander 0.2%
Largest group: White at 81.7% of enrollment.
Student-body diversity index 32.0/100
Simpson diversity index - at 32.0, Central School is less mixed than the Illinois school average of 38.9.
Funding & spending
District-wide per-pupil expenditure for Lemont-Bromberek Csd 113a, which includes Central School.
$13,459
Per student
-21%
vs Illinois
Avg $17,042
-19%
vs U.S.
Avg $16,593
Revenue mix
Local 68.6%
State 20.7%
Federal 10.7%
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 Central School Compares to District-Mates
| School | Enrollment | Economic Profile | Student-Teacher Ratio |
|---|---|---|---|
| Old Quarry Middle Sch | Larger | No free-lunch data | Lower S:T ratio |
| Oakwood School | Similar size | No free-lunch data | Lower S:T ratio |
| River Valley School | Similar size | No free-lunch data | Similar S:T ratio |
Comparisons are relative to Central School's own figures; each column derives from NCES Common Core of Data.
Other Schools in This District
- Enrollment
- 856
- Students per teacher
- 15:1
- Resource Index
- 46/100
- Enrollment
- 629
- Students per teacher
- 15.3:1
- Resource Index
- 42/100
- Enrollment
- 588
- Students per teacher
- 15.5:1
- Resource Index
- 48/100
Similar elementary schools in Lemont
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 (~591 students)
Similar student-teacher ratio (~16.9:1)
Next steps
Verify locally before acting on Central School's federal record.
- Compare Central School against another school. Compare schools
- Lemont-Bromberek Csd 113a'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 Central School
How many students attend Central School?
Central School has 591 students enrolled. It is an elementary school in Lemont, IL.
What is the student-teacher ratio at Central School?
The student-teacher ratio at Central School is 16.9:1, which is 21% higher than the Illinois average of 14:1 and 8% higher than the national average of 15.7:1.
What is the racial and ethnic makeup of Central School?
The largest demographic group at Central School is White at 81.7% of enrollment, in Lemont, IL.
What is the Resource Investment Index for Central School?
Central School has a Resource Investment Index of 32/100 (typical reported resources relative to schools nationally) based on 1 factor: student-teacher ratio. Not a test-score or academic measure (national median ~41/100, see methodology). Limited indicators were available, so the index reflects partial data.
How does Central School rank among public schools in Lemont?
By Resource Investment Index, Central School ranks #5 of 5 public schools in Lemont, 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 Lemont on the city page.
Is Central School a good school?
Central School earns 32/100 on the Resource Investment Index, with class sizes larger than 87% 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 Lemont-Bromberek Csd 113a?
Besides Central School, Lemont-Bromberek Csd 113a also operates Old Quarry Middle Sch (856 students), Oakwood School (629 students), and River Valley School (588 students). See the Lemont-Bromberek Csd 113a 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.