Enrollment
856
Illinois · 2024-25 NCES data
Middle school (grades 6-8) · Lemont, IL
Old Quarry Middle Sch
Federal NCES profile for Old Quarry Middle Sch, including enrollment, faculty, free-lunch eligibility, demographics, and resource indicators - Resource Investment Index 46/100.
2024-25 NCES dataMiddle school (grades 6-8)NCES 170729001933
👥 S:T ratio 40
🌟 Gifted program 30
📋 Attendance 67
Scored 0–100 from federal NCES and CRDC indicators, resource allocation, not test scores. Full methodology →
The verdict
Old Quarry Middle Sch earns 46/100 on the Resource Investment Index, with class sizes larger than 70% of Illinois schools.
- #2 of 5
- public schools in Lemont · Resource Index
- 46
- Resource Index · Typical
- 15:1
- large classes for Illinois
- 856
- students enrolled
Old Quarry Middle Sch has class sizes larger than 70% of Illinois schools. Computed live against every Illinois school reporting to NCES.
By Resource Investment Index, Old Quarry Middle Sch ranks #2 of 5 public schools in Lemont, IL.
School address
District: Lemont-Bromberek Csd 113a · Illinois
NCES ID 170729001933 Verify on NCES CCD record →
Teachers (FTE)
57.0
Federal CCD staff survey
Students per teacher
15:1
vs 14:1 Illinois avg
+7% vs state
Student-teacher ratio in context
How Old Quarry Middle Sch compares with Illinois and U.S. medians
What stands out at Old Quarry Middle Sch
Old Quarry Middle Sch is a large middle school in Lemont, Illinois, enrolling 856 students.
Class loads run somewhat heavier than typical: 15:1 puts it in the larger third of Illinois schools by student-teacher ratio.
By headcount it is one of the larger campuses in Illinois, bigger than 91% of state schools at 856 students.
Its Resource Investment Index lands in the upper third of 3,845 scored Illinois schools.
Its student body is predominantly White (82% of enrollment) (diversity index 31/100).
13.2% of students were chronically absent in the 2021-22 collection, in line with the post-pandemic national range.
The surrounding Lemont-Bromberek Csd 113a spends $13,459 per pupil, 21% below the Illinois average, a leaner-resourced district than most.
Lemont-Bromberek Csd 113a also operates Oakwood School (629 students) and Central School (591 students) alongside Old Quarry Middle Sch.
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 Old Quarry Middle Sch compares
Old Quarry Middle Sch on the metrics families compare, against Illinois and U.S. means.
| Metric | This school | vs Illinois | Illinois avg | U.S. avg |
|---|---|---|---|---|
| Students per teacher | 15:1 | ▲ 7% | 14:1 | 15.7:1 |
| Enrollment | 856 | top 9% | - | - |
Source: NCES Common Core of Data School-level CCD + state/national means from Public School Universe · 2024-25
15:1
Leaner classes than 47% of US schools, a middle-of-the-pack class size.
856
Bigger than 88% of US schools by enrollment, a large campus nationally.
Equity indicators (what these measure)
Staffing depth
15:1
students per teacher
- 7% above state mean
Top 70% in Illinois - lower ratio than 30% of state schools
Close to the 15:1 benchmark most often cited for individualized attention.
Engagement
13.2%
chronically absent (missed 10%+ of school days)
In the 10-15% range, above the pre-pandemic national baseline but within the broader post-pandemic picture.
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.
Support staff
Counselors0.0 FTE
Student-support staffing from the Civil Rights Data Collection.
Discipline context
28
in-school suspensions + 6 out-of-school
Suspension rate: 3.3 per 100 students. Combined in-school and out-of-school rate: 4.0 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 82.4%
Hispanic or Latino 9.2%
Asian 5.5%
Two or More 1.6%
African American 0.9%
American Indian / Alaska Native 0.4%
Largest group: White at 82.4% of enrollment.
Student-body diversity index 30.9/100
Simpson diversity index - at 30.9, Old Quarry Middle Sch is less mixed than the Illinois school average of 38.9.
Programs
Funding & spending
District-wide per-pupil expenditure for Lemont-Bromberek Csd 113a, which includes Old Quarry Middle Sch.
$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 Old Quarry Middle Sch Compares to District-Mates
| School | Enrollment | Economic Profile | Student-Teacher Ratio |
|---|---|---|---|
| Oakwood School | Smaller | No free-lunch data | Similar S:T ratio |
| Central School | Smaller | No free-lunch data | Higher S:T ratio |
| River Valley School | Smaller | No free-lunch data | Similar S:T ratio |
Comparisons are relative to Old Quarry Middle Sch's own figures; each column derives from NCES Common Core of Data.
Other Schools in This District
- Enrollment
- 629
- Students per teacher
- 15.3:1
- Resource Index
- 42/100
- Enrollment
- 591
- Students per teacher
- 16.9:1
- Resource Index
- 32/100
- Enrollment
- 588
- Students per teacher
- 15.5:1
- Resource Index
- 48/100
Similar middle 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 (~856 students)
Similar student-teacher ratio (~15:1)
Next steps
Verify locally before acting on Old Quarry Middle Sch's federal record.
- Compare Old Quarry Middle Sch 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 Old Quarry Middle Sch
How many students attend Old Quarry Middle Sch?
Old Quarry Middle Sch has 856 students enrolled. It is a middle school in Lemont, IL.
What is the student-teacher ratio at Old Quarry Middle Sch?
The student-teacher ratio at Old Quarry Middle Sch is 15:1, which is 7% higher than the Illinois average of 14:1 and 4% lower than the national average of 15.7:1.
What is the racial and ethnic makeup of Old Quarry Middle Sch?
The largest demographic group at Old Quarry Middle Sch is White at 82.4% of enrollment, in Lemont, IL.
What is the Resource Investment Index for Old Quarry Middle Sch?
Old Quarry Middle Sch has a Resource Investment Index of 46/100 (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 Old Quarry Middle Sch rank among public schools in Lemont?
By Resource Investment Index, Old Quarry Middle Sch ranks #2 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 Old Quarry Middle Sch a good school?
Old Quarry Middle Sch earns 46/100 on the Resource Investment Index, with class sizes larger than 70% 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 Old Quarry Middle Sch, Lemont-Bromberek Csd 113a also operates Oakwood School (629 students), Central School (591 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.