Enrollment
700
Illinois · 2024-25 NCES data
Other / mixed grade configuration · Washington, IL
Central Primary Sch
Federal NCES profile for Central Primary Sch, including enrollment, faculty, free-lunch eligibility, demographics, and resource indicators - Resource Investment Index 33/100.
2024-25 NCES dataOther / mixed grade configurationNCES 170915006096
👥 S:T ratio 18
🌟 Gifted program 30
🎓 Counselors 0
📋 Attendance 83
Scored 0–100 from federal NCES and CRDC indicators, resource allocation, not test scores. Full methodology →
The verdict
Central Primary Sch earns 33/100 on the Resource Investment Index, with class sizes larger than 96% of Illinois schools.
- #3 of 3
- schools in Washington · Resource Index
- 33
- Resource Index · Typical
- 20.6:1
- large classes for Illinois
- 700
- students enrolled
Central Primary Sch has class sizes larger than 96% of Illinois schools. Computed live against every Illinois school reporting to NCES.
By Resource Investment Index, Central Primary Sch ranks #3 of 3 schools in Washington, IL.
School address
District: Central Sd 51 · Illinois
NCES ID 170915006096 Verify on NCES CCD record →
Teachers (FTE)
34.0
Federal CCD staff survey
Students per teacher
20.6:1
vs 14:1 Illinois avg
+47% vs state
Student-teacher ratio in context
How Central Primary Sch compares with Illinois and U.S. medians
What stands out at Central Primary Sch
Central Primary Sch is a large combined-grade school in Washington, Illinois, enrolling 700 students.
Class loads run heavy: 20.6:1 is larger than about 96% of Illinois schools and 47% above the 14:1 state mean, so each teacher carries more students than is typical.
Enrollment of 700 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 predominantly White (85% of enrollment) (diversity index 27/100).
Counselor access is stretched at roughly 700 students per counselor, well above the ASCA-recommended 250:1 ceiling.
Attendance holds up well here: only 6.9% of students were chronically absent, below the typical post-pandemic national figure.
The surrounding Central Sd 51 spends $10,234 per pupil, 40% below the Illinois average, a leaner-resourced district than most.
Among Washington's public schools, it stands alongside Lincoln Grade School (442 students): Central Primary Sch is larger than that campus by headcount and runs heavier classes (20.6:1 vs 14.3:1).
Its district, Central Sd 51, also runs Central Intermediate Sch (649 students).
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 Central Primary Sch compares
Central Primary Sch on the metrics families compare, against Illinois and U.S. means.
| Metric | This school | vs Illinois | Illinois avg | U.S. avg |
|---|---|---|---|---|
| Students per teacher | 20.6:1 | ▲ 47% | 14:1 | 15.7:1 |
| Enrollment | 700 | top 14% | - | - |
Source: NCES Common Core of Data School-level CCD + state/national means from Public School Universe · 2024-25
20.6:1
Leaner classes than 14% of US schools, heavier class loads than most.
700
Bigger than 80% of US schools by enrollment, a large campus nationally.
Equity indicators (what these measure)
Staffing depth
20.6:1
students per teacher
- 47% above state mean
Top 96% in Illinois - lower ratio than 4% of state schools
Above 20:1, running heavier than the typical U.S. public school; staffing is comparatively stretched.
Engagement
6.9%
chronically absent (missed 10%+ of school days)
In the 5-10% range, close to the pre-pandemic national baseline.
Funding equity
$10,234
per pupil, district-wide
- below Illinois avg of $17,042
Well below the U.S. average per-pupil spend, a notably leaner funding position that may affect programs, facilities, and staffing.
Support staff
Counselors1.0 FTE
Per 700 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 84.9%
Hispanic or Latino 5.4%
Two or More 5.0%
African American 3.3%
Asian 1.1%
American Indian / Alaska Native 0.1%
Native Hawaiian / Pacific Islander 0.1%
Largest group: White at 84.9% of enrollment.
Student-body diversity index 27.3/100
Simpson diversity index - at 27.3, Central Primary Sch is less mixed than the Illinois school average of 38.9.
Programs
Funding & spending
District-wide per-pupil expenditure for Central Sd 51, which includes Central Primary Sch.
$10,234
Per student
-40%
vs Illinois
Avg $17,042
-38%
vs U.S.
Avg $16,593
Revenue mix
Local 56.4%
State 36.9%
Federal 6.8%
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 Central Primary Sch Compares to District-Mates
| School | Enrollment | Economic Profile | Student-Teacher Ratio |
|---|---|---|---|
| Central Intermediate Sch | Similar size | No free-lunch data | Lower S:T ratio |
Comparisons are relative to Central Primary Sch's own figures; each column derives from NCES Common Core of Data.
Other Schools in This District
- Enrollment
- 649
- Students per teacher
- 15.1:1
- Resource Index
- 65/100
Similar other schools in Washington
2 comparable other schools (grades Mixed) serving the same city.
Similar other 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 (~700 students)
Next steps
Verify locally before acting on Central Primary Sch's federal record.
- Compare Central Primary Sch against another school. Compare schools
- Central Sd 51'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 Central Primary Sch
How many students attend Central Primary Sch?
Central Primary Sch has 700 students enrolled. It is a public school in Washington, IL.
What is the student-teacher ratio at Central Primary Sch?
The student-teacher ratio at Central Primary Sch is 20.6:1, which is 47% higher than the Illinois average of 14:1 and 31% higher than the national average of 15.7:1.
What is the racial and ethnic makeup of Central Primary Sch?
The largest demographic group at Central Primary Sch is White at 84.9% of enrollment, in Washington, IL.
What is the Resource Investment Index for Central Primary Sch?
Central Primary Sch has a Resource Investment Index of 33/100 (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 Central Primary Sch rank among schools in Washington?
By Resource Investment Index, Central Primary Sch ranks #3 of 3 schools in Washington, IL. This compares federal resource and staffing data among local peers; it is not a test-score or academic ranking. See all schools in Washington on the city page.
Is Central Primary Sch a good school?
Central Primary Sch earns 33/100 on the Resource Investment Index, with class sizes larger than 96% of Illinois schools. 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 Central Sd 51?
Besides Central Primary Sch, Central Sd 51 also operates Central Intermediate Sch (649 students). See the Central Sd 51 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.