Enrollment
443
Illinois · 2024-25 NCES data
Elementary school (grades K-5) · Cary, IL
Three Oaks School
Federal NCES profile for Three Oaks School, including enrollment, faculty, free-lunch eligibility, demographics, and resource indicators - Resource Investment Index 53/100.
2024-25 NCES dataElementary school (grades K-5)NCES 170873000573
👥 S:T ratio 57
🌟 Gifted program 70
📋 Attendance 34
Scored 0–100 from federal NCES and CRDC indicators, resource allocation, not test scores. Full methodology →
The verdict
Three Oaks School earns 53/100 on the Resource Investment Index, with class sizes smaller than 84% of Illinois schools.
- #2 of 3
- elementary schools in Cary · Resource Index
- 53
- Resource Index · Higher
- 10.8:1
- small classes for Illinois
- 443
- students enrolled
Three Oaks School has class sizes smaller than 84% of Illinois schools. Computed live against every Illinois school reporting to NCES.
By Resource Investment Index, Three Oaks School ranks #2 of 3 elementary schools in Cary, IL.
School address
Teachers (FTE)
41.0
Federal CCD staff survey
Students per teacher
10.8:1
vs 14:1 Illinois avg
-23% vs state
Student-teacher ratio in context
How Three Oaks School compares with Illinois and U.S. medians
What stands out at Three Oaks School
Three Oaks School is a mid-sized elementary school in Cary, Illinois, enrolling 443 students.
Class sizes run a bit leaner than typical: 10.8:1 puts it in the smaller third of Illinois schools by student-teacher ratio.
With 443 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 (63%) and Hispanic or Latino (31%) (diversity index 51/100).
Chronic absenteeism is elevated: 26.6% of students missed 10% or more of school days (2021-22 Civil Rights Data Collection).
Among Cary's elementary schools, it stands alongside Deer Path Elem School (452 students): Three Oaks School is smaller than that campus by headcount and runs leaner classes (10.8:1 vs 13.3:1).
Cary Ccsd 26 also operates Cary Jr High School (761 students) and Deer Path Elem School (452 students) alongside Three Oaks 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 Three Oaks School compares
Three Oaks 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 | 10.8:1 | ▼ 23% | 14:1 | 15.7:1 |
| Enrollment | 443 | top 38% | - | - |
Source: NCES Common Core of Data School-level CCD + state/national means from Public School Universe · 2024-25
10.8:1
Leaner classes than 84% of US schools, among the more generously staffed nationally.
443
Bigger than 54% of US schools by enrollment, mid-sized for the country.
Equity indicators (what these measure)
Staffing depth
10.8:1
students per teacher
- 23% below state mean
Top 16% in Illinois - lower ratio than 84% of state schools
Well under the widely cited 15:1 individualized-attention benchmark, among the leaner class loads nationally.
Engagement
26.6%
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
$14,484
per pupil, district-wide
- below Illinois avg of $17,042
Somewhat below the U.S. average per-pupil spend; funding constraints may affect programs, facilities, and staffing.
Support staff
Counselors0.0 FTE
Student-support staffing from the Civil Rights Data Collection.
Discipline context
1
in-school suspensions + 1 out-of-school
Suspension rate: 0.2 per 100 students. Combined in-school and out-of-school rate: 0.5 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 62.8%
Hispanic or Latino 31.2%
Two or More 3.4%
Asian 1.4%
African American 0.9%
American Indian / Alaska Native 0.5%
Largest group: White at 62.8% of enrollment.
Student-body diversity index 50.7/100
Simpson diversity index - at 50.7, Three Oaks School is more mixed than the Illinois school average of 38.9.
Programs
Gifted & talented Yes
Funding & spending
District-wide per-pupil expenditure for Cary Ccsd 26, which includes Three Oaks School.
$14,484
Per student
-15%
vs Illinois
Avg $17,042
-13%
vs U.S.
Avg $16,593
Revenue mix
Local 63.4%
State 27.8%
Federal 8.8%
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 Three Oaks School Compares to District-Mates
| School | Enrollment | Economic Profile | Student-Teacher Ratio |
|---|---|---|---|
| Cary Jr High School | Larger | No free-lunch data | Higher S:T ratio |
| Deer Path Elem School | Similar size | No free-lunch data | Higher S:T ratio |
| Briargate Elem School | Similar size | No free-lunch data | Higher S:T ratio |
| Oak Knoll Early Childhood Center | Smaller | No free-lunch data | Higher S:T ratio |
Comparisons are relative to Three Oaks School's own figures; each column derives from NCES Common Core of Data.
Other Schools in This District
- Enrollment
- 761
- Students per teacher
- 13.6:1
- Resource Index
- 52/100
- Enrollment
- 452
- Students per teacher
- 13.3:1
- Resource Index
- 52/100
- Enrollment
- 400
- Students per teacher
- 15.4:1
- Resource Index
- 56/100
- Enrollment
- 316
- Students per teacher
- 16.6:1
- Resource Index
- 38/100
Similar elementary schools in Cary
2 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 (~443 students)
Similar student-teacher ratio (~10.8:1)
Next steps
Verify locally before acting on Three Oaks School's federal record.
- Compare Three Oaks School against another school. Compare schools
- Cary Ccsd 26'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 Three Oaks School
How many students attend Three Oaks School?
Three Oaks School has 443 students enrolled. It is an elementary school in Cary, IL.
What is the student-teacher ratio at Three Oaks School?
The student-teacher ratio at Three Oaks School is 10.8:1, which is 23% lower than the Illinois average of 14:1 and 31% 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 Three Oaks School?
The largest demographic group at Three Oaks School is White at 62.8% of enrollment, in Cary, 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 Three Oaks School?
Three Oaks School has a Resource Investment Index of 53/100 (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 Three Oaks School rank among elementary schools in Cary?
By Resource Investment Index, Three Oaks School ranks #2 of 3 elementary schools in Cary, 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 Cary on the city page.
Is Three Oaks School a good school?
Three Oaks School earns 53/100 on the Resource Investment Index, with class sizes smaller than 84% 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 Cary Ccsd 26?
Besides Three Oaks School, Cary Ccsd 26 also operates Cary Jr High School (761 students), Deer Path Elem School (452 students), and Briargate Elem School (400 students). See the Cary Ccsd 26 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.