Enrollment
313
Middle
DISTRICT 387 · STATE 462
SCHOOL COMMUNITY·CASS SD 63·NCES 170879000519
Cass Jr High School
8502 Bailey Rd, Darien, IL 60561 · (331) 481-4000 · DuPage County
GRADES 05–08MIDDLE21-SUBURBREGULAR SCHOOL313 STUDENTS
B+
allk12 Grade
Scored higher than 66% of Illinois public middle schools
- A-Test scores Share of students meeting the state standard in reading, math, and other tested subjects, 2023-24 and 2024-25.
- B-Beats expectations How far test scores land above or below what the share of low-income students predicts for a school in this state.
- ·Three-year trend Not available for this school, so the grade uses the other parts.
Grades compare a school only with schools in the same state, because every state gives its own test. How grades work · Top-graded Illinois public middle schools
Student : Teacher
11.8:1
26 FTE teachers
DISTRICT 12.1:1 · STATE 13.0:1
Free / Reduced Lunch
24%
75 students
DISTRICT 23% · STATE 56%
Community
0
0 members
Enrollment and student:teacher ratio compared against other middle schools. Free/Reduced Lunch and demographics compared against all schools.
Enrollment by grade, 2024-25
| Grade | Students | Share |
|---|---|---|
| Grade 5 | 73 | 23% |
| Grade 6 | 89 | 28% |
| Grade 7 | 81 | 26% |
| Grade 8 | 70 | 22% |
Student demographics
55%Diversity index
The chance that two students picked at random belong to different racial or ethnic groups.
DISTRICT 53% · STATE 69% · US 70%
Student head counts by race/ethnicity from federal NCES enrollment data. District, state, and US figures are each group's share of all public school students in that area (US excludes territories). Very small groups may be suppressed in the source, so categories do not always sum exactly to total enrollment.
Gender split
School pathway
Feeds from
Based on grade levels within Cass SD 63. Attendance zones can vary; confirm enrollment with the district.
Test scores
IAR + ISA 2024-25 . % Proficient (Levels 4-5)English Language Arts
74.0%
IL avg 51.0% . +7.4pp since 2023
Math
45.4%
IL avg 37.9% . +7.7pp since 2023
What this means: On the IAR + ISA, Illinois's statewide test, about 74 of every 100 students at this school read and write at grade level and about 45 of 100 do math at grade level. Across all Illinois schools, those numbers are about 51 and 38. Reading and writing scores are up about 7 points since 2023, while math scores are up about 8 points.
IAR + ISA results by year
| School year | English Language Arts | Math |
|---|---|---|
| 2024-25 | 74.0% | 45.4% |
| 2023-24 | 66.6% | 37.7% |
% Proficient (Levels 4-5), all students and all tested grades.
Source: IAR + ISA. All students, all grades. See all years and grades →
BeatsExpectations
Demographically-adjusted score · methodologyTier
AS EXPECTED
Performing as predicted given the school's student profile
Actual proficiency
58.5%
composite math + reading, all grades
Predicted
57.7%
based on IL schools with similar FRL share
Beats by
+0.8pp
above demographic expectation
What this means: About 58% of students here test proficient in math and reading, compared with the roughly 58% typical for Illinois schools with a similar share of low-income students. BeatsExpectations measures results against demographically similar schools rather than by raw scores, and this school falls within the typical range, neither among Illinois's top nor bottom 10%.
BeatsExpectations runs a per-state regression of proficiency on free/reduced-lunch share, then scores each school by residual. How this is calculated →
Schools most like Cass Jr High School
Cass Jr High School's state test result (58.5% proficient) is higher than 1 of the 5 schools below with a result.
| School | Students | Low-income | Proficient |
|---|---|---|---|
| Cass Jr High School this school | 313 | 24.0% | 58.5% |
| Millburn Middle School Lindenhurst | 388 | 20.9% | 64.6% |
| Lakeview Jr High School Downers Grove | 340 | 17.9% | 67.2% |
| Franklin Middle School Wheaton | 525 | 25.7% | 71.5% |
| Central Middle School Burlington | 418 | 16.5% | 69.7% |
| Park West School Round Lake | 321 | 27.7% | 55.1% |
Matched among Illinois middle schools on enrollment, the share of students from low-income families (eligible for free or reduced-price lunch), and racial and ethnic makeup. Proficient is the average share of students meeting the state standard across all of the school's state tests in 2023-24 and 2024-25, the same combined score our test-score rankings use. Online schools and schools serving specialized populations are not matched.
Where Cass Jr High School ranks
Among middle schools| Measure | This school | In Illinois | In DuPage County |
|---|---|---|---|
| State test proficiency ranked highest first | 58.5% | #108 of 578 | #23 of 43 |
| Math proficiency ranked highest first | 45.4% | #187 of 640 ▼ 16 | #33 of 51 no change |
| Reading proficiency ranked highest first | 74.0% | #138 of 640 ▼ 14 | #27 of 51 ▼ 4 |
| Enrollment ranked largest first | 313 | #441 of 691 | #41 of 51 |
| Students per teacher ranked fewest first | 11.8:1 | #163 of 558 | #17 of 48 |
| Diversity index ranked most diverse first | 54.6% | #220 of 560 | #30 of 48 |
| Free and reduced lunch ranked highest share first | 24.0% | #498 of 581 | #31 of 43 |
| Enrollment change since 2017-18 ranked fastest growth first | +7.2% | #65 of 127 | #6 of 10 |
Ranked against other public middle schools. Online schools are left out of every list, and test-score lists leave out schools that serve specialized populations. Each rank links to the full list. Arrows under a test-score rank show places moved since the prior test year, among schools tested both years.
4-year change
SY 2020-21 vs SY 2024-25Enrollment
313
-31 (-9%) vs 2020
-3% since 1990-91, when it was 324
Source: NCES Common Core of Data
Enrollment and staffing by year
| School year | Students | Teachers (FTE) | Students per teacher | Free and reduced lunch |
|---|---|---|---|---|
| 2024-25 | 313 | 26.4 | 11.8:1 | 24% (75) |
| 2023-24 | 327 | 25 | 13.1:1 | 26% (84) |
| 2022-23 | 324 | 25 | 13.0:1 | 24% (78) |
| 2020-21 | 344 | N/A | N/A | N/A |
| 2017-18 | 292 | 19.5 | 15.0:1 | 17% (51) |
| 2015-16 | 297 | 27 | 11.0:1 | 18% (54) |
| 2010-11 | 384 | 24 | 16.0:1 | 24% (92) |
| 2000-01 | 411 | 27 | 15.2:1 | N/A |
| 1990-91 | 324 | 19 | 17.1:1 | N/A |
Source: NCES Common Core of Data. Rows are the federal collections on file for Cass Jr High School.
Since 2017-18: students up 7% (292 to 313); teachers up 35% (19.5 to 26.4).
About Cass Jr High School
Located in Darien, Illinois, Cass Jr High School is a small middle school. The school's enrollment of 313 students covers grades 5 through 8. Statewide, middle schools in Illinois average about 462 students each.
The 2 schools of Cass SD 63, including Cass Jr High School, enroll 773 students.
White students are the majority at Cass Jr High School, with 65% of enrollment. Enrollment also includes 13% Asian, 12% Hispanic, 6% multiracial, and 4% Black. County-wide, about 65% of residents are White. Cass Jr High School's diversity index is 55%, against a US figure of 70%.
The school's student-to-teacher ratio is about 11.8:1, with 26.4 full-time-equivalent teachers. That is lower than the 13.0:1 average for middle schools in Illinois. Lunch subsidy eligibility at Cass Jr High School is 24%. For comparison, public schools in DuPage County average 34%.
Measured against Illinois public middle schools, Cass Jr High School receives a B+. The grade weighs proficiency most heavily, then how results compare with what the school's low-income share predicts, then the three-year change.
After adjusting for student poverty, Cass Jr High School lands between the top and bottom 10% of Illinois schools. Its average proficiency rate on state tests is 58.5%; the prediction is 57.7%.
DuPage County has these Census figures: the median household income is $112,096, roughly 52% of adults have a four-year degree or more, and about 5% of residents live below the federal poverty line. DuPage County is home to 277 public schools and about 138,557 public school students.
Concord Elementary School is the closest public school, about 0.8 miles away in a straight line. Other public schools within five miles number at least 8. The nearest schools with test data average 53.7%, lower than Cass Jr High School's 58.5%.
Federal data place Cass Jr High School in the Suburb: Large locale, which means it is in a suburban area outside a principal city, within an urbanized area with a population of 250,000 or more.
2024-25 enrollment was 313, a 9% decrease from 344 in 2020-21.
Topics for discussion here include school events, clubs, and volunteer needs. Alumni can share how the school prepared them.
DuPage County at a glance
View full county profilePopulation
930,024
Census ACS
Median income
$112,096
Household, ACS
Bachelor's+
52%
Adults 25+
Poverty rate
5%
Below federal line
Schools in county
277
138,557 students
Quick facts
Related schools
Other schools in Darien
- Hinsdale South High SchoolHigh · 1,370 students
- Concord Elementary SchoolElementary · 460 students
- Mark DeLay SchoolElementary · 453 students
- Elizabeth Ide Elementary SchoolElementary · 410 students
- Eisenhower Jr High SchoolMiddle · 407 students
- Lace Elementary SchoolElementary · 377 students
Nearby schools
- Concord Elementary School0.8 mi · 460
- Prairieview Elementary School1.1 mi · 380
- Lakeview Jr High School1.2 mi · 340
- Elizabeth Ide Elementary School1.2 mi · 410
- Eisenhower Jr High School1.4 mi · 407
- Lace Elementary School1.4 mi · 377
Frequently asked questions
About Cass Jr High SchoolWhat is the total enrollment at Cass Jr High School?
Cass Jr High School enrolls approximately 313 students in grades 05-08.
What grades does Cass Jr High School serve?
Cass Jr High School serves grades 05-08.
What is the student-teacher ratio at Cass Jr High School?
The student-to-teacher ratio at Cass Jr High School is approximately 11.8:1 (26 FTE teachers).
What is the racial breakdown of students at Cass Jr High School?
At Cass Jr High School, the student body is approximately 65% White, 12% Hispanic, 4% Black, 13% Asian, 6% Two or more.
Who oversees Cass Jr High School?
Cass Jr High School is overseen by Cass SD 63 in DuPage County.
Data sourceSchool profile facts are sourced from the NCES. Community content is posted by allk12 members.