Enrollment
362
Illinois · 2024-25 NCES data
Elementary school (grades K-5) · Aledo, IL
Apollo Elem School
Federal NCES profile for Apollo Elem School, including enrollment, faculty, free-lunch eligibility, demographics, and resource indicators - Resource Investment Index 34/100.
2024-25 NCES dataElementary school (grades K-5)NCES 170139500019
👥 S:T ratio 44
🌟 Gifted program 30
🎓 Counselors 28
📋 Attendance 35
Scored 0–100 from federal NCES and CRDC indicators, resource allocation, not test scores. Full methodology →
The verdict
Apollo Elem School earns 34/100 on the Resource Investment Index, with class sizes near the Illinois median.
- #2 of 3
- public schools in Aledo · Resource Index
- 34
- Resource Index · Typical
- 13.9:1
- students per teacher
- 362
- students enrolled
Apollo Elem School has class sizes near the Illinois median. Computed live against every Illinois school reporting to NCES.
By Resource Investment Index, Apollo Elem School ranks #2 of 3 public schools in Aledo, IL.
School address
District: Mercer County School District 404 · Illinois
NCES ID 170139500019 Verify on NCES CCD record →
Teachers (FTE)
26.0
Federal CCD staff survey
Students per teacher
13.9:1
vs 14:1 Illinois avg
-1% vs state
Student-teacher ratio in context
How Apollo Elem School compares with Illinois and U.S. medians
What stands out at Apollo Elem School
Apollo Elem School is a mid-sized elementary school in Aledo, Illinois, enrolling 362 students.
At 13.9:1, 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.
With 362 students, its enrollment sits close to the Illinois median campus size.
Its Resource Investment Index lands in the lower third of 3,845 scored Illinois schools.
Its student body is predominantly White (89% of enrollment) (diversity index 20/100).
Counselor availability sits well past the ASCA benchmark, roughly 362 students sharing each counselor, though short of the most stretched campuses.
Chronic absenteeism is elevated: 26.0% of students missed 10% or more of school days (2021-22 Civil Rights Data Collection).
Mercer County School District 404 also operates Mercer County High School (411 students) and Mercer County Jr High School (270 students) alongside Apollo Elem 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 Apollo Elem School compares
Apollo Elem 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 | 13.9:1 | ▼ 1% | 14:1 | 15.7:1 |
| Enrollment | 362 | top 52% | - | - |
Source: NCES Common Core of Data School-level CCD + state/national means from Public School Universe · 2024-25
13.9:1
Leaner classes than 58% of US schools, a middle-of-the-pack class size.
362
Bigger than 42% of US schools by enrollment, mid-sized for the country.
Equity indicators (what these measure)
Staffing depth
13.9:1
students per teacher
- 1% below state mean
Top 55% in Illinois - lower ratio than 45% of state schools
Close to the 15:1 benchmark most often cited for individualized attention.
Engagement
26.0%
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
$13,924
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
Counselors1.0 FTE
Per 362 students, the combined health-and-guidance staffing load for this school.
Discipline context
0
in-school suspensions + 0 out-of-school
Suspension rate: 0.0 per 100 students. Combined in-school and out-of-school rate: 0.0 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 89.2%
Two or More 6.1%
African American 2.5%
Asian 1.1%
Hispanic or Latino 0.8%
Native Hawaiian / Pacific Islander 0.3%
Largest group: White at 89.2% of enrollment.
Student-body diversity index 20.0/100
Simpson diversity index - at 20.0, Apollo Elem School is less mixed than the Illinois school average of 38.9.
Programs
Funding & spending
District-wide per-pupil expenditure for Mercer County School District 404, which includes Apollo Elem School.
$13,924
Per student
-18%
vs Illinois
Avg $17,042
-16%
vs U.S.
Avg $16,593
Revenue mix
Local 53.6%
State 38.0%
Federal 8.3%
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 Apollo Elem School Compares to District-Mates
| School | Enrollment | Economic Profile | Student-Teacher Ratio |
|---|---|---|---|
| Mercer County High School | Similar size | No free-lunch data | Similar S:T ratio |
| Mercer County Jr High School | Smaller | No free-lunch data | Lower S:T ratio |
| New Boston Elem School | Smaller | No free-lunch data | Lower S:T ratio |
| Mercer County Elc | Smaller | No free-lunch data | Higher S:T ratio |
Comparisons are relative to Apollo Elem School's own figures; each column derives from NCES Common Core of Data.
Other Schools in This District
- Enrollment
- 411
- Students per teacher
- 14.2:1
- Resource Index
- 29/100
- Enrollment
- 270
- Students per teacher
- 11.7:1
- Resource Index
- 42/100
- Enrollment
- 165
- Students per teacher
- 8.3:1
- Resource Index
- 32/100
- Enrollment
- 66
- Students per teacher
- 22:1
- Resource Index
- 12/100
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 (~362 students)
Next steps
Verify locally before acting on Apollo Elem School's federal record.
- Compare Apollo Elem School against another school. Compare schools
- Mercer County School District 404'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 Apollo Elem School
How many students attend Apollo Elem School?
Apollo Elem School has 362 students enrolled. It is an elementary school in Aledo, IL.
What is the student-teacher ratio at Apollo Elem School?
The student-teacher ratio at Apollo Elem School is 13.9:1, which is 1% lower than the Illinois average of 14:1 and 11% 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 Apollo Elem School?
The largest demographic group at Apollo Elem School is White at 89.2% of enrollment, in Aledo, IL.
What is the Resource Investment Index for Apollo Elem School?
Apollo Elem School has a Resource Investment Index of 34/100 (typical reported resources relative to schools nationally) based on 4 factors: student-teacher ratio, counselor availability, attendance rates. Not a test-score or academic measure (national median ~41/100, see methodology).
How does Apollo Elem School rank among public schools in Aledo?
By Resource Investment Index, Apollo Elem School ranks #2 of 3 public schools in Aledo, 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 Aledo on the city page.
Is Apollo Elem School a good school?
Apollo Elem School earns 34/100 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 Mercer County School District 404?
Besides Apollo Elem School, Mercer County School District 404 also operates Mercer County High School (411 students), Mercer County Jr High School (270 students), and New Boston Elem School (165 students). See the Mercer County School District 404 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.