Enrollment
264
Elementary
DISTRICT 165 · STATE 381
SCHOOL COMMUNITY·ILLINI CENTRAL CUSD 189·NCES 170011305388
Illini Central Grade School
208 N West Ave, Mason City, IL 62664 · (217) 482-5180 · Mason County
GRADES KG–05ELEMENTARY42-RURALTITLE IREGULAR SCHOOL264 STUDENTS
C
allk12 Grade
Scored higher than 29% of Illinois public elementary schools
- C+Test scores Share of students meeting the state standard in reading, math, and other tested subjects, 2023-24 and 2024-25.
- CBeats 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 elementary schools
Student : Teacher
10.1:1
26 FTE teachers
DISTRICT 15.9:1 · STATE 13.9:1
Free / Reduced Lunch
58%
153 students
DISTRICT 47% · STATE 56%
Community
0
0 members
Enrollment and student:teacher ratio compared against other elementary schools. Free/Reduced Lunch and demographics compared against all schools.
Enrollment by grade, 2024-25
| Grade | Students | Share |
|---|---|---|
| Kindergarten | 43 | 16% |
| Grade 1 | 50 | 19% |
| Grade 2 | 40 | 15% |
| Grade 3 | 45 | 17% |
| Grade 4 | 42 | 16% |
| Grade 5 | 44 | 17% |
This year's kindergarten class (43) is about the same size as its 5th grade class (44).
Student demographics
13%Diversity index
The chance that two students picked at random belong to different racial or ethnic groups.
DISTRICT 11% · 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
Students here typically continue to
Feeds from
Based on grade levels within Illini Central CUSD 189. Attendance zones can vary; confirm enrollment with the district.
Test scores
IAR + ISA 2024-25 . % Proficient (Levels 4-5)English Language Arts
30.8%
IL avg 51.0% . +8.5pp since 2023
Math
36.1%
IL avg 37.9% . +13.0pp since 2023
What this means: On the IAR + ISA, Illinois's statewide test, about 31 of every 100 students at this school read and write at grade level and about 36 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 9 points since 2023, while math scores are up about 13 points.
IAR + ISA results by year
| School year | English Language Arts | Math |
|---|---|---|
| 2024-25 | 30.8% | 36.1% |
| 2023-24 | 22.3% | 23.1% |
% 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
32.9%
composite math + reading, all grades
Predicted
38.0%
based on IL schools with similar FRL share
Beats by
-5.1pp
below demographic expectation
What this means: About 33% of students here test proficient in math and reading, compared with the roughly 38% 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 Illini Central Grade School
Illini Central Grade School's state test result (32.9% proficient) is higher than 2 of the 5 schools below with a result.
| School | Students | Low-income | Proficient |
|---|---|---|---|
| Illini Central Grade School this school | 264 | 58.0% | 32.9% |
| Marissa Elementary School Marissa | 266 | 57.5% | 28.1% |
| South Central Elementary-Kinmundy Kinmundy | 269 | 59.5% | 36.2% |
| Southeastern Elementary School Bowen | 247 | 59.1% | 34.6% |
| Palestine Grade School Palestine | 274 | 55.1% | 28.8% |
| Martinsville Elementary School Martinsville | 238 | 58.8% | 45.4% |
Matched among Illinois elementary 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 Illini Central Grade School ranks
Among elementary schools| Measure | This school | In Illinois |
|---|---|---|
| State test proficiency ranked highest first | 32.9% | #1,160 of 1,925 |
| Math proficiency ranked highest first | 36.1% | #1,082 of 2,077 ▼ 20 |
| Reading proficiency ranked highest first | 30.8% | #1,642 of 2,077 ▼ 155 |
| Enrollment ranked largest first | 264 | #1,745 of 2,419 |
| Students per teacher ranked fewest first | 10.1:1 | #135 of 2,035 |
| Diversity index ranked most diverse first | 13.0% | #1,815 of 2,042 |
| Free and reduced lunch ranked highest share first | 58.0% | #1,069 of 2,132 |
| Enrollment change since 2017-18 ranked steepest decline first | -8.0% | #1,027 of 1,461 |
Ranked against other public elementary 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
264
-14 (-5%) vs 2020
-34% since 1990-91, when it was 397
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 | 264 | 26.1 | 10.1:1 | 58% (153) |
| 2023-24 | 255 | 26 | 9.8:1 | 7% (19) |
| 2022-23 | 252 | 27.1 | 9.3:1 | 10% (25) |
| 2020-21 | 278 | N/A | N/A | N/A |
| 2017-18 | 287 | 26 | 11.1:1 | 39% (111) |
| 2015-16 | 377 | 29 | 13.0:1 | 47% (179) |
| 2010-11 | 405 | 30 | 13.5:1 | 44% (178) |
| 2000-01 | 469 | 37 | 12.7:1 | N/A |
| 1990-91 | 397 | 25 | 15.9:1 | N/A |
Source: NCES Common Core of Data. Rows are the federal collections on file for Illini Central Grade School.
Since 2017-18: students down 8% (287 to 264); teachers unchanged (26 to 26.1).
About Illini Central Grade School
Illini Central Grade School is a public small elementary school in Mason City, Illinois. Federal data show 264 students enrolled in kindergarten through 5 in 2024-25. That compares with an average of about 381 students for elementary schools in Illinois.
Illini Central CUSD 189 is the local district for Illini Central Grade School. It runs 4 schools with 640 students.
A large majority of enrollment at Illini Central Grade School is White, at 93%. It is also 3% Hispanic and 3% multiracial. Among Mason County residents, the White share is about 95%. On the diversity index, which measures the chance that two random students are from different groups, Illini Central Grade School scores 13%.
Based on 26.1 full-time-equivalent teachers, Illini Central Grade School has a ratio of 10.1:1. Across elementary schools in Illinois, the average ratio is 13.9:1. Income data for the school show 58% of students eligible for free or reduced-price lunch.
Among Illinois public elementary schools, Illini Central Grade School outscored 29%, which works out to a C on the allk12 Grade.
Based on student poverty, the model expects 38.0% at Illini Central Grade School; the school's average proficiency rate across its state test results is 32.9%.
In Mason County, home to about 12,745 people, the median household earns about $62,845 a year, roughly 17% of adults have a four-year degree or more, and about 11% of residents live below the federal poverty line. Public schools in Mason County number 9, with about 2,124 students.
Illini Central Middle School is less than a tenth of a mile away, making it the nearest public school. There are 3 more public schools inside five miles. Ranking the closest schools with test data puts Illini Central Grade School at 6th of 8.
Illini Central Grade School falls in the Rural: Distant locale category, used for schools in rural territory some distance from an urban area.
Over the 4 years from 2020-21 to 2024-25, enrollment decreased 5%.
People who know Illini Central Grade School can post here about special education services, counseling, and support programs. Parents, students, alumni, and staff are welcome to post.
Mason County at a glance
View full county profilePopulation
12,745
Census ACS
Median income
$62,845
Household, ACS
Bachelor's+
17%
Adults 25+
Poverty rate
11%
Below federal line
Schools in county
9
2,124 students
Quick facts
Related schools
Other schools in Illini Central CUSD 189
- Illini Central High SchoolHigh · 172 students
- Illini Central Middle SchoolMiddle · 139 students
- West Campus FacilityElementary · 65 students
Other schools in Mason City
- Illini Central High SchoolHigh · 172 students
- Illini Central Middle SchoolMiddle · 139 students
- West Campus FacilityElementary · 65 students
Nearby schools
- Illini Central Middle School0.0 mi · 139
- Illini Central High School0.0 mi · 172
- West Campus Facility0.6 mi · 65
- Greenview Jr/Sr High School8.7 mi · 107
- Greenview Elementary School8.7 mi · 117
- New Holland-Middletown Elementary School9.7 mi · 70
Frequently asked questions
About Illini Central Grade SchoolHow many students attend Illini Central Grade School?
Illini Central Grade School enrolls approximately 264 students in grades KG-05.
Is Illini Central Grade School an elementary, middle, or high school?
Illini Central Grade School is an elementary school covering grades KG-05.
How many teachers does Illini Central Grade School have?
Illini Central Grade School employs 26 FTE teachers, for a student-to-teacher ratio of 10.1:1.
How diverse is Illini Central Grade School?
Illini Central Grade School reports a student body of 93% White, 3% Hispanic, 0% Asian, 3% Two or more.
Who oversees Illini Central Grade School?
Illini Central Grade School is overseen by Illini Central CUSD 189 in Mason County.
Data sourceSchool profile facts are sourced from the NCES. Community content is posted by allk12 members.