- Enrollment
- 264
- Students per teacher
- 9.8:1
- Resource Index
- 41/100
Middle school (grades 6-8) · Mason City, IL
Illini Central Middle School
Federal NCES profile for Illini Central Middle School, including enrollment, faculty, free-lunch eligibility, demographics, and resource indicators - Resource Investment Index 43/100.
2024-25 NCES dataMiddle school (grades 6-8)NCES 170011305577
👥 S:T ratio 54
🌟 Gifted program 30
🎓 Counselors 72
📋 Attendance 16
Scored 0–100 from federal NCES and CRDC indicators, resource allocation, not test scores. Full methodology →
The verdict
Illini Central Middle School earns 43/100 on the Resource Investment Index, with class sizes smaller than 76% of Illinois schools. It is also less racially and ethnically mixed than most Illinois schools.
- #1 of 4
- public schools in Mason City · Resource Index
- 43
- Resource Index · Typical
- 11.6:1
- small classes for Illinois
- 139
- students enrolled
Illini Central Middle School has class sizes smaller than 76% of Illinois schools. Computed live against every Illinois school reporting to NCES.
By Resource Investment Index, Illini Central Middle School ranks #1 of 4 public schools in Mason City, IL.
School address
District: Illini Central Cusd 189 · Illinois
NCES ID 170011305577 Verify on NCES CCD record →
CCD year-over-year · 2022-23 → 2023-24
+9 students YoY
Illini Central Middle School grew from 142 students in 2022-23 to 151 in 2023-24 (+6.3%).
Teacher FTE added 12.0 → 12.4 across the same CCD years.
Source: NCES Common Core of Data public-school universe (2022-23, 2023-24).
Growing CCD campus
+9 students YoY 170011305577 · Mason City, IL Middle · SMALL · TRAD
139 enr · 11.6:1 · RII 43
Nearest enrollment peer: Illini Central Grade School (264 students)
Illini Central Middle School grew from 142 students in 2022-23 to 151 in 2023-24 (+6.3%). Teacher FTE added 12.0 → 12.4 across the same CCD years. Read with this school → · District book → · Illinois schools → · Find another →
Illini Central Middle School in the enrollment neighbourhood
Fall enrollment among this campus and nearest district peers
- Illini Central
Illini Central Grade School
264 students
- Illini Central
Illini Central High School
172 students
- This school
Illini Central Middle School
139 students
- West Campus Fa 65
West Campus Facility
65 students
What this shows Illini Central Middle School reports 139 students on the CCD universe file.
How Illini Central Middle School compares
Illini Central Middle School is a growing campus on CCD: ratios and free-lunch share vs Illinois and U.S. means.
| Metric | This school | vs Illinois | Illinois avg | U.S. avg |
|---|---|---|---|---|
| Students per teacher | 11.6:1 | ▼ 17% | 14:1 | 15.7:1 |
| Enrollment | 139 | top 91% | - | - |
Source: NCES Common Core of Data School-level CCD + state/national means from Public School Universe · 2024-25
11.6:1
Leaner classes than 79% of US schools, among the more generously staffed nationally.
139
Bigger than 14% of US schools by enrollment, a small campus.
Equity indicators methodology
Staffing depth
11.6:1
students per teacher
- 17% below state mean
Top 24% in Illinois - lower ratio than 76% of state schools
Well under the widely cited 15:1 individualized-attention benchmark, among the leaner class loads nationally.
Engagement
33.8%
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
$17,704
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 139 students, the combined health-and-guidance staffing load for this school.
Discipline context
0
in-school suspensions + 18 out-of-school
Suspension rate: 0.0 per 100 students. Combined in-school and out-of-school rate: 12.9 per 100 students. Reported via the Civil Rights Data Collection.
Student demographics
White 95.7%
Hispanic or Latino 2.2%
Two or More 2.2%
Largest group: White at 95.7% of enrollment.
Student-body diversity index 8.3/100
Simpson diversity index - at 8.3, Illini Central Middle School is less mixed than the Illinois school average of 38.9.
Programs
District finance for Illini Central Cusd 189 reports $17,704 per pupil (NCES F-33) - open the district page for the full revenue mix.
How Illini Central Middle School Compares to District-Mates
| School | Enrollment | Economic Profile | Student-Teacher Ratio |
|---|---|---|---|
| Illini Central Grade School | Larger | No free-lunch data | Lower S:T ratio |
| Illini Central High School | Similar size | No free-lunch data | Lower S:T ratio |
| West Campus Facility | Smaller | No free-lunch data | Higher S:T ratio |
Comparisons are relative to Illini Central Middle School's own figures; each column derives from NCES Common Core of Data.
Other Schools in This District
- Enrollment
- 172
- Students per teacher
- 9.1:1
- Resource Index
- 42/100
- Enrollment
- 65
- Students per teacher
- 21.7:1
- Resource Index
- 43/100
Nationwide middle 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 (~139 students)
Frequently asked questions about Illini Central Middle School
How many students attend Illini Central Middle School?
Illini Central Middle School has 139 students enrolled. It is a middle school in Mason City, IL. CCD year-over-year: 142 (2022-23) → 151 (2023-24), up 9.
What is the student-teacher ratio at Illini Central Middle School?
The student-teacher ratio at Illini Central Middle School is 11.6:1, which is 17% lower than the Illinois average of 14:1 and 26% 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 Illini Central Middle School?
The largest demographic group at Illini Central Middle School is White at 95.7% of enrollment, in Mason City, IL.
What is the Resource Investment Index for Illini Central Middle School?
Illini Central Middle School has a Resource Investment Index of 43/100 (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 Illini Central Middle School rank among public schools in Mason City?
By Resource Investment Index, Illini Central Middle School ranks #1 of 4 public schools in Mason City, IL. This compares federal resource and staffing data among local peers; it is not a test-score or academic ranking.
What other schools are in Illini Central Cusd 189?
Besides Illini Central Middle School, Illini Central Cusd 189 also operates Illini Central Grade School (264 students), Illini Central High School (172 students), and West Campus Facility (65 students). See the Illini Central Cusd 189 district page for the complete list.