- Enrollment
- 2,923
- Students per teacher
- 13.2:1
- Resource Index
- 41/100
High school (grades 9-12) · Northbrook, IL
Glenbrook North High School
Federal NCES profile for Glenbrook North High School, including enrollment, faculty, free-lunch eligibility, demographics, and resource indicators - Resource Investment Index 46/100.
2024-25 NCES dataHigh school (grades 9-12)NCES 172901003042
👥 S:T ratio 44
🌟 Gifted program 30
🎓 Counselors 50
📋 Attendance 62
Scored 0–100 from federal NCES and CRDC indicators, resource allocation, not test scores. Full methodology →
The verdict
Glenbrook North High School earns 46/100 on the Resource Investment Index, with class sizes near the Illinois median. It is also one of the largest schools in Illinois.
- #11 of 11
- public schools in Northbrook · Resource Index
- 46
- Resource Index · Typical
- 14.1:1
- students per teacher
- 2,111
- students enrolled
Glenbrook North High School has class sizes near the Illinois median. Computed live against every Illinois school reporting to NCES.
By Resource Investment Index, Glenbrook North High School ranks #11 of 11 public schools in Northbrook, IL.
School address
District: Glenbrook Hsd 225 · Illinois
NCES ID 172901003042 Verify on NCES CCD record →
CCD year-over-year · 2022-23 → 2023-24
+15 students YoY
Glenbrook North High School held near 2,077 students from 2022-23 to 2023-24 (+15 headcount).
Teacher FTE added 150.3 → 162.7 across the same CCD years.
Source: NCES Common Core of Data public-school universe (2022-23, 2023-24).
Steady CCD campus
+15 students YoY 172901003042 · Northbrook, IL High · LARGE · TRAD
2,111 enr · 14.1:1 · RII 46
Nearest enrollment peer: Glenbrook South High School (2,923 students)
Glenbrook North High School held near 2,077 students from 2022-23 to 2023-24 (+15 headcount). Teacher FTE added 150.3 → 162.7 across the same CCD years. Read with this school → · District book → · Illinois schools → · Find another →
How Glenbrook North High School compares
Glenbrook North 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 | 14.1:1 | ▲ 1% | 14:1 | 15.7:1 |
| Enrollment | 2,111 | top 2% | - | - |
Source: NCES Common Core of Data School-level CCD + state/national means from Public School Universe · 2024-25
14.1:1
Leaner classes than 56% of US schools, a middle-of-the-pack class size.
2,111
Bigger than 98% of US schools by enrollment, a large campus nationally.
Equity indicators methodology
Staffing depth
14.1:1
students per teacher
- 1% above state mean
Top 58% in Illinois - lower ratio than 42% of state schools
Close to the 15:1 benchmark most often cited for individualized attention.
Engagement
15.4%
chronically absent (missed 10%+ of school days)
In the 15-20% range, nearing the "high" absenteeism threshold.
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
Counselors8.4 FTE
Per 251 students, the combined health-and-guidance staffing load for this school.
Discipline context
20
in-school suspensions + 8 out-of-school
Suspension rate: 0.9 per 100 students. Combined in-school and out-of-school rate: 1.3 per 100 students. Reported via the Civil Rights Data Collection.
Student demographics
White 66.1%
Asian 22.5%
Hispanic or Latino 5.2%
Two or More 4.9%
African American 0.9%
Native Hawaiian / Pacific Islander 0.3%
Largest group: White at 66.1% of enrollment.
Student-body diversity index 50.7/100
Simpson diversity index - at 50.7, Glenbrook North High School is more mixed than the Illinois school average of 38.9.
Programs
AP courses offered 22
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 North High School Compares to District-Mates
| School | Enrollment | Economic Profile | Student-Teacher Ratio |
|---|---|---|---|
| Glenbrook South High School | Larger | No free-lunch data | Similar S:T ratio |
Comparisons are relative to Glenbrook North 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 (~2,111 students)
Frequently asked questions about Glenbrook North High School
How many students attend Glenbrook North High School?
Glenbrook North High School has 2,111 students enrolled. It is a high school in Northbrook, IL. CCD year-over-year: 2,062 (2022-23) → 2,077 (2023-24), nearly flat (+15).
What is the student-teacher ratio at Glenbrook North High School?
The student-teacher ratio at Glenbrook North High School is 14.1:1, which is 1% higher than the Illinois average of 14:1 and 10% lower than the national average of 15.7:1.
What is the racial and ethnic makeup of Glenbrook North High School?
The largest demographic group at Glenbrook North High School is White at 66.1% of enrollment, in Northbrook, IL. Its student body is more racially and ethnically mixed than most US schools, with a diversity index of 50.7/100.
What is the Resource Investment Index for Glenbrook North High School?
Glenbrook North High School has a Resource Investment Index of 46/100 (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 North High School rank among public schools in Northbrook?
By Resource Investment Index, Glenbrook North High School ranks #11 of 11 public schools in Northbrook, 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 Northbrook on the city page.
What other schools are in Glenbrook Hsd 225?
Besides Glenbrook North High School, Glenbrook Hsd 225 also operates Glenbrook South High School (2,923 students). See the Glenbrook Hsd 225 district page for the complete list.