- Enrollment
- 2,082
- Students per teacher
- 13.6:1
- Resource Index
- 45/100
High school (grades 9-12) · Downers Grove, IL
Comm H S Dist 99 - South High Sch
Federal NCES profile for Comm H S Dist 99 - South High Sch, including enrollment, faculty, free-lunch eligibility, demographics, and resource indicators - Resource Investment Index 38/100.
2024-25 NCES dataHigh school (grades 9-12)NCES 171257001519
👥 S:T ratio 42
🌟 Gifted program 30
🎓 Counselors 53
📋 Attendance 29
Scored 0–100 from federal NCES and CRDC indicators, resource allocation, not test scores. Full methodology →
The verdict
Comm H S Dist 99 - South High Sch earns 38/100 on the Resource Investment Index, with class sizes near the Illinois median. It is also one of the largest schools in Illinois.
- #17 of 17
- public schools in Downers Grove · Resource Index
- 38
- Resource Index · Typical
- 14.5:1
- students per teacher
- 2,591
- students enrolled
Comm H S Dist 99 - South High Sch has class sizes near the Illinois median. Computed live against every Illinois school reporting to NCES.
By Resource Investment Index, Comm H S Dist 99 - South High Sch ranks #17 of 17 public schools in Downers Grove, IL.
School address
NCES ID 171257001519 Verify on NCES CCD record →
CCD year-over-year · 2022-23 → 2023-24
-33 students YoY
Comm H S Dist 99 - South High Sch held near 2,604 students from 2022-23 to 2023-24 (-33 headcount).
Teacher FTE held 179.6 → 179.4 across the same CCD years.
Source: NCES Common Core of Data public-school universe (2022-23, 2023-24).
Steady CCD campus
-33 students YoY 171257001519 · Downers Grove, IL High · LARGE · TRAD
2,591 enr · 14.5:1 · RII 38
Nearest enrollment peer: Comm H S Dist 99 - North H S (2,082 students)
Comm H S Dist 99 - South High Sch held near 2,604 students from 2022-23 to 2023-24 (-33 headcount). Teacher FTE held 179.6 → 179.4 across the same CCD years. Read with this school → · District book → · Illinois schools → · Find another →
How Comm H S Dist 99 - South High Sch compares
Comm H S Dist 99 - South High Sch held steady on CCD headcount: ratios and free-lunch share vs Illinois and U.S. means.
| Metric | This school | vs Illinois | Illinois avg | U.S. avg |
|---|---|---|---|---|
| Students per teacher | 14.5:1 | ▲ 4% | 14:1 | 15.7:1 |
| Enrollment | 2,591 | top 1% | - | - |
Source: NCES Common Core of Data School-level CCD + state/national means from Public School Universe · 2024-25
14.5:1
Leaner classes than 52% of US schools, a middle-of-the-pack class size.
2,591
Bigger than 99% of US schools by enrollment, a large campus nationally.
Equity indicators methodology
Staffing depth
14.5:1
students per teacher
- 4% above state mean
Top 63% in Illinois - lower ratio than 37% of state schools
Close to the 15:1 benchmark most often cited for individualized attention.
Engagement
28.4%
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
$26,343
per pupil, district-wide
- above Illinois avg of $18,196
Well above the U.S. public-school average, reflecting substantially higher local or state investment per enrolled student.
Support staff
Counselors11.0 FTE
Per 236 students, the combined health-and-guidance staffing load for this school.
Discipline context
2
in-school suspensions + 99 out-of-school
Suspension rate: 0.1 per 100 students. Combined in-school and out-of-school rate: 3.9 per 100 students. Reported via the Civil Rights Data Collection.
Student demographics
White 54.1%
Hispanic or Latino 22.9%
African American 11.2%
Asian 7.2%
Two or More 4.2%
Native Hawaiian / Pacific Islander 0.3%
American Indian / Alaska Native 0.1%
Largest group: White at 54.1% of enrollment.
Student-body diversity index 63.5/100
Simpson diversity index - at 63.5, Comm H S Dist 99 - South High Sch is more mixed than the Illinois school average of 38.9.
Programs
AP courses offered 11
District finance for Chsd 99 reports $26,343 per pupil (NCES F-33) - open the district page for the full revenue mix.
How Comm H S Dist 99 - South High Sch Compares to District-Mates
| School | Enrollment | Economic Profile | Student-Teacher Ratio |
|---|---|---|---|
| Comm H S Dist 99 - North H S | Similar size | No free-lunch data | Similar S:T ratio |
Comparisons are relative to Comm H S Dist 99 - South High Sch's own figures; each column derives from NCES Common Core of Data.
Other Schools in This District
Similar high schools in Downers Grove
1 comparable high schools (grades 9-12) serving the same city.
Nationwide high schools with similar size or staffing
Out-of-state peers matched by enrollment and by student-teacher ratio, not the same-city or same-district lists above.
Similar enrollment (~2,591 students)
Frequently asked questions about Comm H S Dist 99 - South High Sch
How many students attend Comm H S Dist 99 - South High Sch?
Comm H S Dist 99 - South High Sch has 2,591 students enrolled. It is a high school in Downers Grove, IL. CCD year-over-year: 2,637 (2022-23) → 2,604 (2023-24), nearly flat (-33).
What is the student-teacher ratio at Comm H S Dist 99 - South High Sch?
The student-teacher ratio at Comm H S Dist 99 - South High Sch is 14.5:1, which is 4% higher than the Illinois average of 14:1 and 8% lower than the national average of 15.7:1.
What is the racial and ethnic makeup of Comm H S Dist 99 - South High Sch?
The largest demographic group at Comm H S Dist 99 - South High Sch is White at 54.1% of enrollment, in Downers Grove, IL. Its student body is more racially and ethnically mixed than most US schools, with a diversity index of 63.5/100.
What is the Resource Investment Index for Comm H S Dist 99 - South High Sch?
Comm H S Dist 99 - South High Sch has a Resource Investment Index of 38/100 (typical reported resources relative to schools nationally) based on 4 factors: student-teacher ratio, gifted-program reporting, counselor availability, chronic absenteeism. Not a test-score or academic measure (national median ~41/100, see methodology).
How does Comm H S Dist 99 - South High Sch rank among public schools in Downers Grove?
By Resource Investment Index, Comm H S Dist 99 - South High Sch ranks #17 of 17 public schools in Downers Grove, 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 Downers Grove on the city page.
What other schools are in Chsd 99?
Besides Comm H S Dist 99 - South High Sch, Chsd 99 also operates Comm H S Dist 99 - North H S (2,082 students). See the Chsd 99 district page for the complete list.