Enrollment
352
Illinois · 2024-25 NCES data
Elementary school (grades K-5) · Northbrook, IL
Greenbriar Elem School
Federal NCES profile for Greenbriar Elem School, including enrollment, faculty, free-lunch eligibility, demographics, and resource indicators - Resource Investment Index 74/100.
2024-25 NCES dataElementary school (grades K-5)NCES 172898003038
👥 S:T ratio 62
🌟 Gifted program 70
📋 Attendance 91
Scored 0–100 from federal NCES and CRDC indicators, resource allocation, not test scores. Full methodology →
The verdict
Greenbriar Elem School earns 74/100 on the Resource Investment Index, with class sizes smaller than 93% of Illinois schools.
- #1 of 4
- elementary schools in Northbrook · Resource Index
- 74
- Resource Index · Higher
- 9.5:1
- small classes for Illinois
- 352
- students enrolled
Greenbriar Elem School has class sizes smaller than 93% of Illinois schools. Computed live against every Illinois school reporting to NCES.
By Resource Investment Index, Greenbriar Elem School ranks #1 of 4 elementary schools in Northbrook, IL.
School address
District: Northbrook Sd 28 · Illinois
NCES ID 172898003038 Verify on NCES CCD record →
Teachers (FTE)
37.0
Federal CCD staff survey
Students per teacher
9.5:1
vs 14:1 Illinois avg
-32% vs state
Student-teacher ratio in context
How Greenbriar Elem School compares with Illinois and U.S. medians
What stands out at Greenbriar Elem School
Greenbriar Elem School is a mid-sized elementary school in Northbrook, Illinois, enrolling 352 students.
Classes run notably small here: at 9.5:1, Greenbriar Elem School is leaner than roughly 93% of Illinois schools and 32% under the state's 14:1 norm, more adult attention per pupil than most peers.
With 352 students, its enrollment sits close to the Illinois median campus size.
Its Resource Investment Index outscores 100% of the 3,845 Illinois schools with a score on record, a top-tier result on this measure.
Its student body is led by White (79%) and Asian (11%) (diversity index 36/100).
Attendance holds up well here: only 3.7% of students were chronically absent, below the typical post-pandemic national figure.
The surrounding Northbrook Sd 28 spends $28,607 per pupil, 68% above the Illinois average, a better-resourced district than most.
Among Northbrook's elementary schools, it stands alongside Meadowbrook Elem School (497 students): Greenbriar Elem School is smaller than that campus by headcount and runs leaner classes (9.5:1 vs 11.3:1).
Northbrook Sd 28 also operates Northbrook Junior High School (621 students) and Meadowbrook Elem School (497 students) alongside Greenbriar Elem 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 Greenbriar Elem School compares
Greenbriar Elem 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 | 9.5:1 | ▼ 32% | 14:1 | 15.7:1 |
| Enrollment | 352 | top 54% | - | - |
Source: NCES Common Core of Data School-level CCD + state/national means from Public School Universe · 2024-25
9.5:1
Leaner classes than 91% of US schools, among the more generously staffed nationally.
352
Bigger than 40% of US schools by enrollment, mid-sized for the country.
Equity indicators (what these measure)
Staffing depth
9.5:1
students per teacher
- 32% below state mean
Top 7% in Illinois - lower ratio than 93% of state schools
Well under the widely cited 15:1 individualized-attention benchmark, among the leaner class loads nationally.
Engagement
3.7%
chronically absent (missed 10%+ of school days)
Below 5%, comfortably under the pre-pandemic national baseline for chronic absenteeism.
Funding equity
$28,607
per pupil, district-wide
- above Illinois avg of $17,042
Well above the U.S. public-school average, reflecting substantially higher local or state investment per enrolled student.
Support staff
Counselors0.0 FTE
Student-support staffing from the Civil Rights Data Collection.
Discipline context
2
in-school suspensions + 2 out-of-school
Suspension rate: 0.6 per 100 students. Combined in-school and out-of-school rate: 1.1 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 79.0%
Asian 10.8%
Hispanic or Latino 4.0%
Two or More 4.0%
African American 2.3%
Largest group: White at 79.0% of enrollment.
Student-body diversity index 36.1/100
Simpson diversity index - at 36.1, Greenbriar Elem School is less mixed than the Illinois school average of 38.9.
Programs
Gifted & talented Yes
Funding & spending
District-wide per-pupil expenditure for Northbrook Sd 28, which includes Greenbriar Elem School.
$28,607
Per student
+68%
vs Illinois
Avg $17,042
+72%
vs U.S.
Avg $16,593
Revenue mix
Local 74.5%
State 23.5%
Federal 2.0%
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 Greenbriar Elem School Compares to District-Mates
| School | Enrollment | Economic Profile | Student-Teacher Ratio |
|---|---|---|---|
| Northbrook Junior High School | Larger | No free-lunch data | Similar S:T ratio |
| Meadowbrook Elem School | Larger | No free-lunch data | Higher S:T ratio |
| Westmoor Elem School | Similar size | No free-lunch data | Similar S:T ratio |
Comparisons are relative to Greenbriar Elem School's own figures; each column derives from NCES Common Core of Data.
Other Schools in This District
- Enrollment
- 621
- Students per teacher
- 9.6:1
- Resource Index
- 70/100
- Enrollment
- 497
- Students per teacher
- 11.3:1
- Resource Index
- 67/100
- Enrollment
- 358
- Students per teacher
- 8.9:1
- Resource Index
- 73/100
Similar elementary schools in Northbrook
3 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 (~352 students)
Similar student-teacher ratio (~9.5:1)
Next steps
Verify locally before acting on Greenbriar Elem School's federal record.
- Compare Greenbriar Elem School against another school. Compare schools
- Northbrook Sd 28'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 Greenbriar Elem School
How many students attend Greenbriar Elem School?
Greenbriar Elem School has 352 students enrolled. It is an elementary school in Northbrook, IL.
What is the student-teacher ratio at Greenbriar Elem School?
The student-teacher ratio at Greenbriar Elem School is 9.5:1, which is 32% lower than the Illinois average of 14:1 and 39% 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 Greenbriar Elem School?
The largest demographic group at Greenbriar Elem School is White at 79.0% of enrollment, in Northbrook, IL.
What is the Resource Investment Index for Greenbriar Elem School?
Greenbriar Elem School has a Resource Investment Index of 74/100 (higher 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 Greenbriar Elem School rank among elementary schools in Northbrook?
By Resource Investment Index, Greenbriar Elem School ranks #1 of 4 elementary 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 elementary schools in Northbrook on the city page.
Is Greenbriar Elem School a good school?
Greenbriar Elem School earns 74/100 on the Resource Investment Index, with class sizes smaller than 93% 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 Northbrook Sd 28?
Besides Greenbriar Elem School, Northbrook Sd 28 also operates Northbrook Junior High School (621 students), Meadowbrook Elem School (497 students), and Westmoor Elem School (358 students). See the Northbrook Sd 28 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.