- Enrollment
- 460
- Students per teacher
- 13.1:1
- Resource Index
- 40/100
Elementary school (grades K-5) · Darien, IL
Cass Jr High School
Federal NCES profile for Cass Jr High School, including enrollment, faculty, free-lunch eligibility, demographics, and resource indicators - Resource Investment Index 47/100.
2024-25 NCES dataElementary school (grades K-5)NCES 170879000519
👥 S:T ratio 48
🌟 Gifted program 70
🎓 Counselors 37
📋 Attendance 35
Scored 0–100 from federal NCES and CRDC indicators, resource allocation, not test scores. Full methodology →
The verdict
Cass Jr High School earns 47/100 on the Resource Investment Index, with class sizes near the Illinois median.
- #2 of 7
- public schools in Darien · Resource Index
- 47
- Resource Index · Typical
- 13:1
- students per teacher
- 313
- students enrolled
Cass Jr High School has class sizes near the Illinois median. Computed live against every Illinois school reporting to NCES.
By Resource Investment Index, Cass Jr High School ranks #2 of 7 public schools in Darien, IL.
School address
CCD year-over-year · 2022-23 → 2023-24
+3 students YoY
Cass Jr High School held near 327 students from 2022-23 to 2023-24 (+3 headcount).
Teacher FTE held 25.0 → 25.0 across the same CCD years.
Source: NCES Common Core of Data public-school universe (2022-23, 2023-24).
Steady CCD campus
+3 students YoY 170879000519 · Darien, IL Elementary · SMALL · TRAD
313 enr · 13:1 · RII 47
Nearest enrollment peer: Concord Elem School (460 students)
Cass Jr High School held near 327 students from 2022-23 to 2023-24 (+3 headcount). Teacher FTE held 25.0 → 25.0 across the same CCD years. Read with this school → · District book → · Illinois schools → · Find another →
How Cass Jr High School compares
Cass Jr 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 | 13:1 | ▼ 7% | 14:1 | 15.7:1 |
| Enrollment | 313 | top 61% | - | - |
Source: NCES Common Core of Data School-level CCD + state/national means from Public School Universe · 2024-25
13:1
Leaner classes than 67% of US schools, among the more generously staffed nationally.
313
Bigger than 34% of US schools by enrollment, mid-sized for the country.
Equity indicators methodology
Staffing depth
13:1
students per teacher
- 7% below state mean
Top 42% in Illinois - lower ratio than 58% of state schools
Well under the widely cited 15:1 individualized-attention benchmark, among the leaner class loads nationally.
Engagement
26.2%
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
$17,928
per pupil, district-wide
- below Illinois avg of $18,196
Close to the U.S. public-school average per-pupil spend.
Support staff
Counselors1.0 FTE
Per 313 students, the combined health-and-guidance staffing load for this school.
Discipline context
0
in-school suspensions + 5 out-of-school
Suspension rate: 0.0 per 100 students. Combined in-school and out-of-school rate: 1.6 per 100 students. Reported via the Civil Rights Data Collection.
Student demographics
White 64.5%
Asian 13.1%
Hispanic or Latino 12.5%
Two or More 5.8%
African American 3.8%
Native Hawaiian / Pacific Islander 0.3%
Largest group: White at 64.5% of enrollment.
Student-body diversity index 54.6/100
Simpson diversity index - at 54.6, Cass Jr High School is more mixed than the Illinois school average of 38.9.
Programs
Gifted & talented Yes
District finance for Cass Sd 63 reports $17,928 per pupil (NCES F-33) - open the district page for the full revenue mix.
How Cass Jr High School Compares to District-Mates
| School | Enrollment | Economic Profile | Student-Teacher Ratio |
|---|---|---|---|
| Concord Elem School | Larger | No free-lunch data | Similar S:T ratio |
Comparisons are relative to Cass Jr High School's own figures; each column derives from NCES Common Core of Data.
Other Schools in This District
Similar elementary schools in Darien
1 comparable elementary schools (grades K-5) serving the same city.
Nationwide elementary 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 (~313 students)
Frequently asked questions about Cass Jr High School
How many students attend Cass Jr High School?
Cass Jr High School has 313 students enrolled. It is an elementary school in Darien, IL. CCD year-over-year: 324 (2022-23) → 327 (2023-24), nearly flat (+3).
What is the student-teacher ratio at Cass Jr High School?
The student-teacher ratio at Cass Jr High School is 13:1, which is 7% lower than the Illinois average of 14:1 and 17% 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 Cass Jr High School?
The largest demographic group at Cass Jr High School is White at 64.5% of enrollment, in Darien, IL. Its student body is more racially and ethnically mixed than most US schools, with a diversity index of 54.6/100.
What is the Resource Investment Index for Cass Jr High School?
Cass Jr High School has a Resource Investment Index of 47/100 (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 Cass Jr High School rank among public schools in Darien?
By Resource Investment Index, Cass Jr High School ranks #2 of 7 public schools in Darien, 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 Darien on the city page.
What other schools are in Cass Sd 63?
Besides Cass Jr High School, Cass Sd 63 also operates Concord Elem School (460 students). See the Cass Sd 63 district page for the complete list.