Enrollment
87
Wisconsin · 2024-25 NCES data
Other / mixed grade configuration · Greenfield, WI
Core4
Federal NCES profile for Core4, including enrollment, faculty, free-lunch eligibility, demographics, and resource indicators - Resource Investment Index 21/100.
2024-25 NCES dataOther / mixed grade configurationNCES 550600002673Charter school
👥 S:T ratio 13
🌟 Gifted program 30
Scored 0–100 from federal NCES and CRDC indicators, resource allocation, not test scores. Full methodology →
The verdict
Core4 earns 21/100 on the Resource Investment Index, with class sizes larger than 94% of Wisconsin schools.
- #5 of 5
- schools in Greenfield · Resource Index
- 21
- Resource Index · Lower
- 21.8:1
- large classes for Wisconsin
- 27.6%
- free-lunch eligible
Core4 has class sizes larger than 94% of Wisconsin schools. Computed live against every Wisconsin school reporting to NCES.
By Resource Investment Index, Core4 ranks #5 of 5 schools in Greenfield, WI.
School address
District: Whitnall School District · Wisconsin
NCES ID 550600002673 Verify on NCES CCD record →
Teachers (FTE)
4.0
Federal CCD staff survey
Students per teacher
21.8:1
vs 14.4:1 Wisconsin avg
+51% vs state
Free-lunch eligible
27.6%
vs 38.5% Wisconsin avg
-28% vs state
Student-teacher ratio in context
How Core4 compares with Wisconsin and U.S. medians
What stands out at Core4
Core4 is a small charter combined-grade school in Greenfield, Wisconsin, enrolling 87 students.
Class loads run heavy: 21.8:1 is larger than about 94% of Wisconsin schools and 51% above the 14.4:1 state mean, so each teacher carries more students than is typical.
Economic need runs somewhat below the state's typical profile, with 27.6% of students eligible for free meals.
Enrollment of 87 puts it in the smaller third of Wisconsin schools by headcount.
Its Resource Investment Index trails 96% of the 2,202 Wisconsin schools with a score on record, one of the lower results on this measure.
Among 150 similarly sized, similarly resourced-need Wisconsin schools statewide, it ranks #143, in the lower tier once campus size and economic need are matched.
Its student body is led by White (72%) and Hispanic or Latino (14%) (diversity index 45/100).
Among Greenfield's public schools, it stands alongside Elm Dale Elementary (477 students): Core4 is smaller than that campus by headcount and runs heavier classes (21.8:1 vs 12.9:1).
Whitnall School District also operates Whitnall High (821 students) and Whitnall Middle (558 students) alongside Core4.
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 Core4 compares
Core4 on the metrics families compare, against Wisconsin and U.S. means.
| Metric | This school | vs Wisconsin | Wisconsin avg | U.S. avg |
|---|---|---|---|---|
| Students per teacher | 21.8:1 | ▲ 51% | 14.4:1 | 15.7:1 |
| Free-lunch eligible | 27.6% | ▼ 28% | 38.5% | 51.7% |
| Enrollment | 87 | top 89% | - | - |
Source: NCES Common Core of Data School-level CCD + state/national means from Public School Universe · 2024-25
21.8:1
Leaner classes than 11% of US schools, heavier class loads than most.
87
Bigger than 9% of US schools by enrollment, a small campus.
Equity indicators (what these measure)
Economic need
27.6%
free-lunch eligible
- 28% below the Wisconsin average of 38.5%
Below the 40% Title I threshold; federal aid targets individual qualifying students rather than schoolwide programs.
Staffing depth
21.8:1
students per teacher
- 51% above state mean
Top 94% in Wisconsin - lower ratio than 6% of state schools
Above 20:1, running heavier than the typical U.S. public school; staffing is comparatively stretched.
Funding equity
$13,055
per pupil, district-wide
- below Wisconsin avg of $14,919
Well below the U.S. average per-pupil spend, a notably leaner funding position that may affect programs, facilities, and staffing.
Discipline context
0
in-school suspensions + 0 out-of-school
Suspension rate: 0.0 per 100 students. Combined in-school and out-of-school rate: 0.0 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 72.4%
Hispanic or Latino 13.8%
Two or More 6.9%
Asian 5.7%
African American 1.1%
Largest group: White at 72.4% of enrollment.
Student-body diversity index 44.9/100
Simpson diversity index - at 44.9, Core4 is more mixed than the Wisconsin school average of 35.7.
Programs
Funding & spending
District-wide per-pupil expenditure for Whitnall School District, which includes Core4.
$13,055
Per student
-12%
vs Wisconsin
Avg $14,919
-21%
vs U.S.
Avg $16,593
Revenue mix
Local 55.0%
State 36.1%
Federal 8.9%
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 Core4 Compares to District-Mates
| School | Enrollment | Economic Profile | Student-Teacher Ratio |
|---|---|---|---|
| Whitnall High | Larger | Similar economic need | Lower S:T ratio |
| Whitnall Middle | Larger | Similar economic need | Lower S:T ratio |
| Hales Corners Elementary | Larger | Similar economic need | Lower S:T ratio |
| Edgerton Elementary | Larger | Similar economic need | Lower S:T ratio |
Comparisons are relative to Core4's own figures; each column derives from NCES Common Core of Data.
Other Schools in This District
- Enrollment
- 821
- Students per teacher
- 13.7:1
- Resource Index
- 51/100
- Enrollment
- 558
- Students per teacher
- 12.4:1
- Resource Index
- 45/100
- Enrollment
- 520
- Students per teacher
- 13.7:1
- Resource Index
- 38/100
- Enrollment
- 378
- Students per teacher
- 11.8:1
- Resource Index
- 48/100
Similar other schools in Greenfield
4 comparable other schools (grades Mixed) serving the same city.
Elm Dale Elementary
Standard public school
477 students 12.9:1 students per teacher
Maple Grove Elementary
Standard public school
427 students 12.2:1 students per teacher
Edgewood Elementary
Standard public school
325 students 12.5:1 students per teacher
Glenwood Elementary
Standard public school
307 students 15.3:1 students per teacher
Similar other schools statewide
Matched by enrollment size and by staffing ratio across all of Wisconsin, not just this city - a different peer set than the local comparisons above.
Similar enrollment (~87 students)
Similar student-teacher ratio (~21.8:1)
Next steps
Verify locally before acting on Core4's federal record.
- Compare Core4 against another school. Compare schools
- Whitnall School District'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 Core4
How many students attend Core4?
Core4 has 87 students enrolled. It is a public school in Greenfield, WI.
What is the student-teacher ratio at Core4?
The student-teacher ratio at Core4 is 21.8:1, which is 51% higher than the Wisconsin average of 14.4:1 and 39% higher than the national average of 15.7:1.
What percentage of students receive free lunch at Core4?
27.6% of students at Core4 are eligible for free lunch, compared to the Wisconsin average of 38.5%.
What is the racial and ethnic makeup of Core4?
The largest demographic group at Core4 is White at 72.4% of enrollment, in Greenfield, WI.
What is the Resource Investment Index for Core4?
Core4 has a Resource Investment Index of 21/100 (lower reported resources relative to schools nationally) based on 2 factors: student-teacher ratio. Not a test-score or academic measure (national median ~41/100, see methodology). Limited indicators were available, so the index reflects partial data.
How does Core4 rank among schools in Greenfield?
By Resource Investment Index, Core4 ranks #5 of 5 schools in Greenfield, WI. This compares federal resource and staffing data among local peers; it is not a test-score or academic ranking. See all schools in Greenfield on the city page.
Is Core4 a good school?
Core4 earns 21/100 on the Resource Investment Index, with class sizes larger than 94% of Wisconsin 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 Whitnall School District?
Besides Core4, Whitnall School District also operates Whitnall High (821 students), Whitnall Middle (558 students), and Hales Corners Elementary (520 students). See the Whitnall School District 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.