Enrollment
589
Illinois · 2024-25 NCES data
Elementary school (grades K-5) · Mattoon, IL
Riddle Elementary School
Federal NCES profile for Riddle Elementary School, including enrollment, faculty, free-lunch eligibility, demographics, and resource indicators - Resource Investment Index 33/100.
2024-25 NCES dataElementary school (grades K-5)NCES 172505005655
👥 S:T ratio 44
🌟 Gifted program 30
📋 Attendance 24
Scored 0–100 from federal NCES and CRDC indicators, resource allocation, not test scores. Full methodology →
The verdict
Riddle Elementary School earns 33/100 on the Resource Investment Index, with class sizes near the Illinois median.
- #1 of 5
- public schools in Mattoon · Resource Index
- 33
- Resource Index · Typical
- 14:1
- students per teacher
- 589
- students enrolled
Riddle Elementary School has class sizes near the Illinois median. Computed live against every Illinois school reporting to NCES.
By Resource Investment Index, Riddle Elementary School ranks #1 of 5 public schools in Mattoon, IL.
School address
District: Mattoon Cusd 2 · Illinois
NCES ID 172505005655 Verify on NCES CCD record →
Teachers (FTE)
42.0
Federal CCD staff survey
Students per teacher
14:1
vs 14:1 Illinois avg
+0% vs state
Student-teacher ratio in context
How Riddle Elementary School compares with Illinois and U.S. medians
What stands out at Riddle Elementary School
Riddle Elementary School is a mid-sized elementary school in Mattoon, Illinois, enrolling 589 students.
At 14:1, its student-teacher ratio sits close to the Illinois median, within a few percentage points of the 14:1 state norm, neither notably crowded nor notably small.
Enrollment of 589 puts it in the larger third of Illinois schools by headcount.
Its Resource Investment Index lands in the lower third of 3,845 scored Illinois schools.
Its student body is led by White (79%) and Two or More (10%) (diversity index 36/100).
Chronic absenteeism is elevated: 30.4% of students missed 10% or more of school days (2021-22 Civil Rights Data Collection).
Its district draws 17.2% of revenue from federal sources, an above-typical federal share that tends to track a higher-need student population.
Among Mattoon's elementary schools, it stands alongside Arland D Williams Jr Elem Sch (653 students): Riddle Elementary School is smaller than that campus by headcount and runs leaner classes (14:1 vs 14.2:1).
Mattoon Cusd 2 also operates Mattoon High School (888 students) and Arland D Williams Jr Elem Sch (653 students) alongside Riddle Elementary 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 Riddle Elementary School compares
Riddle Elementary 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 | 14:1 | ▼ 0% | 14:1 | 15.7:1 |
| Enrollment | 589 | top 21% | - | - |
Source: NCES Common Core of Data School-level CCD + state/national means from Public School Universe · 2024-25
14:1
Leaner classes than 57% of US schools, a middle-of-the-pack class size.
589
Bigger than 72% of US schools by enrollment, mid-sized for the country.
Equity indicators (what these measure)
Staffing depth
14:1
students per teacher
- 0% above state mean
Top 56% in Illinois - lower ratio than 44% of state schools
Close to the 15:1 benchmark most often cited for individualized attention.
Engagement
30.4%
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
$14,376
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
20
in-school suspensions + 33 out-of-school
Suspension rate: 3.4 per 100 students. Combined in-school and out-of-school rate: 9.0 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 79.1%
Two or More 10.4%
Hispanic or Latino 6.6%
African American 3.6%
Asian 0.2%
Native Hawaiian / Pacific Islander 0.2%
Largest group: White at 79.1% of enrollment.
Student-body diversity index 35.8/100
Simpson diversity index - at 35.8, Riddle Elementary School is less mixed than the Illinois school average of 38.9.
Programs
Funding & spending
District-wide per-pupil expenditure for Mattoon Cusd 2, which includes Riddle Elementary School.
$14,376
Per student
-16%
vs Illinois
Avg $17,042
-13%
vs U.S.
Avg $16,593
Revenue mix
Local 38.1%
State 44.7%
Federal 17.2%
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 Riddle Elementary School Compares to District-Mates
| School | Enrollment | Economic Profile | Student-Teacher Ratio |
|---|---|---|---|
| Mattoon High School | Larger | No free-lunch data | Higher S:T ratio |
| Arland D Williams Jr Elem Sch | Similar size | No free-lunch data | Similar S:T ratio |
| Mattoon Middle School | Similar size | No free-lunch data | Lower S:T ratio |
| Franklin Elementary School | Smaller | No free-lunch data | No ratio data |
Comparisons are relative to Riddle Elementary School's own figures; each column derives from NCES Common Core of Data.
Other Schools in This District
- Enrollment
- 888
- Students per teacher
- 16.4:1
- Resource Index
- 21/100
- Enrollment
- 653
- Students per teacher
- 14.2:1
- Resource Index
- 24/100
- Enrollment
- 610
- Students per teacher
- 12.4:1
- Resource Index
- 27/100
- Enrollment
- 243
- Students per teacher
- -
- Resource Index
- 30/100
Similar elementary schools in Mattoon
1 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 (~589 students)
Next steps
Verify locally before acting on Riddle Elementary School's federal record.
- Compare Riddle Elementary School against another school. Compare schools
- Mattoon Cusd 2'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 Riddle Elementary School
How many students attend Riddle Elementary School?
Riddle Elementary School has 589 students enrolled. It is an elementary school in Mattoon, IL.
What is the student-teacher ratio at Riddle Elementary School?
The student-teacher ratio at Riddle Elementary School is 14:1, which is 0% higher than the Illinois average of 14:1 and 11% lower than the national average of 15.7:1.
What is the racial and ethnic makeup of Riddle Elementary School?
The largest demographic group at Riddle Elementary School is White at 79.1% of enrollment, in Mattoon, IL.
What is the Resource Investment Index for Riddle Elementary School?
Riddle Elementary School has a Resource Investment Index of 33/100 (typical 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 Riddle Elementary School rank among public schools in Mattoon?
By Resource Investment Index, Riddle Elementary School ranks #1 of 5 public schools in Mattoon, 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 Mattoon on the city page.
Is Riddle Elementary School a good school?
Riddle Elementary School earns 33/100 on the Resource Investment Index, with class sizes near the Illinois median. 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 Mattoon Cusd 2?
Besides Riddle Elementary School, Mattoon Cusd 2 also operates Mattoon High School (888 students), Arland D Williams Jr Elem Sch (653 students), and Mattoon Middle School (610 students). See the Mattoon Cusd 2 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.