Enrollment
333
Illinois · 2024-25 NCES data
Middle school (grades 6-8) · Northbrook, IL
Field School
Federal NCES profile for Field School, including enrollment, faculty, free-lunch eligibility, demographics, and resource indicators - Resource Investment Index 55/100.
2024-25 NCES dataMiddle school (grades 6-8)NCES 174170004176
👥 S:T ratio 61
🌟 Gifted program 30
📋 Attendance 75
Scored 0–100 from federal NCES and CRDC indicators, resource allocation, not test scores. Full methodology →
The verdict
Field School earns 55/100 on the Resource Investment Index, with class sizes smaller than 91% of Illinois schools. It is also more racially and ethnically mixed than most Illinois schools.
- #4 of 4
- middle schools in Northbrook · Resource Index
- 55
- Resource Index · Higher
- 9.8:1
- small classes for Illinois
- 333
- students enrolled
Field School has class sizes smaller than 91% of Illinois schools. Computed live against every Illinois school reporting to NCES.
By Resource Investment Index, Field School ranks #4 of 4 middle schools in Northbrook, IL.
School address
District: West Northfield Sd 31 · Illinois
NCES ID 174170004176 Verify on NCES CCD record →
Teachers (FTE)
34.0
Federal CCD staff survey
Students per teacher
9.8:1
vs 14:1 Illinois avg
-30% vs state
Student-teacher ratio in context
How Field School compares with Illinois and U.S. medians
What stands out at Field School
Field School is a mid-sized middle school in Northbrook, Illinois, enrolling 333 students.
Classes run notably small here: at 9.8:1, Field School is leaner than roughly 91% of Illinois schools and 30% under the state's 14:1 norm, more adult attention per pupil than most peers.
With 333 students, its enrollment sits close to the Illinois median campus size.
Its Resource Investment Index lands in the upper third of 3,845 scored Illinois schools.
Its student body is led by White (38%) and Asian (37%), more mixed than most schools in the state (diversity index 69/100).
10.2% of students were chronically absent in the 2021-22 collection, in line with the post-pandemic national range.
The surrounding West Northfield Sd 31 spends $27,202 per pupil, 60% above the Illinois average, a better-resourced district than most.
Among Northbrook's middle schools, it stands alongside Northbrook Junior High School (621 students): Field School is smaller than that campus by headcount and runs heavier classes (9.8:1 vs 9.6:1).
Its district, West Northfield Sd 31, also runs Henry Winkelman Elem School (677 students).
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 Field School compares
Field 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 | 9.8:1 | ▼ 30% | 14:1 | 15.7:1 |
| Enrollment | 333 | top 57% | - | - |
Source: NCES Common Core of Data School-level CCD + state/national means from Public School Universe · 2024-25
9.8:1
Leaner classes than 90% of US schools, among the more generously staffed nationally.
333
Bigger than 37% of US schools by enrollment, mid-sized for the country.
Equity indicators (what these measure)
Staffing depth
9.8:1
students per teacher
- 30% below state mean
Top 9% in Illinois - lower ratio than 91% of state schools
Well under the widely cited 15:1 individualized-attention benchmark, among the leaner class loads nationally.
Engagement
10.2%
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
$27,202
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
8
in-school suspensions + 0 out-of-school
Suspension rate: 2.4 per 100 students. Combined in-school and out-of-school rate: 2.4 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 38.0%
Asian 36.7%
Two or More 13.0%
Hispanic or Latino 11.4%
African American 0.9%
Largest group: White at 38.0% of enrollment.
Student-body diversity index 69.1/100
Simpson diversity index - at 69.1, Field School is more mixed than the Illinois school average of 38.9.
Programs
Funding & spending
District-wide per-pupil expenditure for West Northfield Sd 31, which includes Field School.
$27,202
Per student
+60%
vs Illinois
Avg $17,042
+64%
vs U.S.
Avg $16,593
Revenue mix
Local 69.9%
State 22.2%
Federal 7.9%
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 Field School Compares to District-Mates
| School | Enrollment | Economic Profile | Student-Teacher Ratio |
|---|---|---|---|
| Henry Winkelman Elem School | Larger | No free-lunch data | Higher S:T ratio |
Comparisons are relative to Field School's own figures; each column derives from NCES Common Core of Data.
Other Schools in This District
- Enrollment
- 677
- Students per teacher
- 12.1:1
- Resource Index
- 51/100
Similar middle schools in Northbrook
3 comparable middle schools (grades 6-8) serving the same city.
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 (~333 students)
Similar student-teacher ratio (~9.8:1)
Next steps
Verify locally before acting on Field School's federal record.
- Compare Field School against another school. Compare schools
- West Northfield Sd 31'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 Field School
How many students attend Field School?
Field School has 333 students enrolled. It is a middle school in Northbrook, IL.
What is the student-teacher ratio at Field School?
The student-teacher ratio at Field School is 9.8:1, which is 30% lower than the Illinois average of 14:1 and 38% 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 Field School?
The largest demographic group at Field School is White at 38.0% of enrollment, in Northbrook, IL. Its student body is more racially and ethnically mixed than most US schools, with a diversity index of 69.1/100.
What is the Resource Investment Index for Field School?
Field School has a Resource Investment Index of 55/100 (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 Field School rank among middle schools in Northbrook?
By Resource Investment Index, Field School ranks #4 of 4 middle 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 middle schools in Northbrook on the city page.
Is Field School a good school?
Field School earns 55/100 on the Resource Investment Index, with class sizes smaller than 91% of Illinois schools. It is also more racially and ethnically mixed than most 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 West Northfield Sd 31?
Besides Field School, West Northfield Sd 31 also operates Henry Winkelman Elem School (677 students). See the West Northfield Sd 31 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.