- Enrollment
- 2,111
- Students per teacher
- 14.1:1
- Resource Index
- 46/100
High school (grades 9-12) · Glenview, IL
Glenbrook South High School
Federal NCES profile for Glenbrook South High School, including enrollment, faculty, free-lunch eligibility, demographics, and resource indicators - Resource Investment Index 41/100.
2024-25 NCES dataHigh school (grades 9-12)NCES 172901003043
👥 S:T ratio 47
🌟 Gifted program 30
🎓 Counselors 51
📋 Attendance 35
Scored 0–100 from federal NCES and CRDC indicators, resource allocation, not test scores. Full methodology →
The verdict
Glenbrook South High School earns 41/100 on the Resource Investment Index, with class sizes near the Illinois median. It is also one of the largest schools in Illinois.
- #13 of 13
- public schools in Glenview · Resource Index
- 41
- Resource Index · Typical
- 13.2:1
- students per teacher
- 2,923
- students enrolled
Glenbrook South High School has class sizes near the Illinois median. Computed live against every Illinois school reporting to NCES.
By Resource Investment Index, Glenbrook South High School ranks #13 of 13 public schools in Glenview, IL.
School address
District: Glenbrook Hsd 225 · Illinois
NCES ID 172901003043 Verify on NCES CCD record →
CCD year-over-year · 2022-23 → 2023-24
-15 students YoY
Glenbrook South High School held near 3,015 students from 2022-23 to 2023-24 (-15 headcount).
Teacher FTE added 222.4 → 228.7 across the same CCD years.
Source: NCES Common Core of Data public-school universe (2022-23, 2023-24).
Steady CCD campus
-15 students YoY 172901003043 · Glenview, IL High · LARGE · TRAD
2,923 enr · 13.2:1 · RII 41
Nearest enrollment peer: Glenbrook North High School (2,111 students)
Glenbrook South High School held near 3,015 students from 2022-23 to 2023-24 (-15 headcount). Teacher FTE added 222.4 → 228.7 across the same CCD years. Read with this school → · District book → · Illinois schools → · Find another →
How Glenbrook South High School compares
Glenbrook South High School 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 | 13.2:1 | ▼ 6% | 14:1 | 15.7:1 |
| Enrollment | 2,923 | top 1% | - | - |
Source: NCES Common Core of Data School-level CCD + state/national means from Public School Universe · 2024-25
13.2:1
Leaner classes than 65% of US schools, a middle-of-the-pack class size.
2,923
Bigger than 99% of US schools by enrollment, a large campus nationally.
Equity indicators methodology
Staffing depth
13.2:1
students per teacher
- 6% below state mean
Top 45% in Illinois - lower ratio than 55% of state schools
Close to the 15:1 benchmark most often cited for individualized attention.
Engagement
26.1%
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
$32,130
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
Counselors12.0 FTE
Per 244 students, the combined health-and-guidance staffing load for this school.
Discipline context
94
in-school suspensions + 53 out-of-school
Suspension rate: 3.2 per 100 students. Combined in-school and out-of-school rate: 5.0 per 100 students. Reported via the Civil Rights Data Collection. Includes 3 expulsions.
Student demographics
White 54.0%
Asian 23.1%
Hispanic or Latino 15.9%
Two or More 5.0%
African American 1.8%
Native Hawaiian / Pacific Islander 0.2%
American Indian / Alaska Native 0.1%
Largest group: White at 54.0% of enrollment.
Student-body diversity index 62.7/100
Simpson diversity index - at 62.7, Glenbrook South High School is more mixed than the Illinois school average of 38.9.
Programs
AP courses offered 27
District finance for Glenbrook Hsd 225 reports $32,130 per pupil (NCES F-33) - open the district page for the full revenue mix.
How Glenbrook South High School Compares to District-Mates
| School | Enrollment | Economic Profile | Student-Teacher Ratio |
|---|---|---|---|
| Glenbrook North High School | Smaller | No free-lunch data | Similar S:T ratio |
Comparisons are relative to Glenbrook South High School's own figures; each column derives from NCES Common Core of Data.
Other Schools in This District
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 (~2,923 students)
Similar student-teacher ratio (~13.2:1)
Frequently asked questions about Glenbrook South High School
How many students attend Glenbrook South High School?
Glenbrook South High School has 2,923 students enrolled. It is a high school in Glenview, IL. CCD year-over-year: 3,030 (2022-23) → 3,015 (2023-24), nearly flat (-15).
What is the student-teacher ratio at Glenbrook South High School?
The student-teacher ratio at Glenbrook South High School is 13.2:1, which is 6% lower than the Illinois average of 14:1 and 16% lower than the national average of 15.7:1. Lower ratios generally mean more individual attention per student.
What is the racial and ethnic makeup of Glenbrook South High School?
The largest demographic group at Glenbrook South High School is White at 54.0% of enrollment, in Glenview, IL. Its student body is more racially and ethnically mixed than most US schools, with a diversity index of 62.7/100.
What is the Resource Investment Index for Glenbrook South High School?
Glenbrook South High School has a Resource Investment Index of 41/100 (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 Glenbrook South High School rank among public schools in Glenview?
By Resource Investment Index, Glenbrook South High School ranks #13 of 13 public schools in Glenview, 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 Glenview on the city page.
What other schools are in Glenbrook Hsd 225?
Besides Glenbrook South High School, Glenbrook Hsd 225 also operates Glenbrook North High School (2,111 students). See the Glenbrook Hsd 225 district page for the complete list.