Enrollment
327
Illinois · 2024-25 NCES data
2024-25 NCES data Other / mixed grade configuration NCES 171185004424 Charter school
Robertson Charter School — Decatur, IL
Federal NCES profile for Robertson Charter School, including enrollment, faculty, free-lunch eligibility, demographics, and resource indicators — Resource Investment Index 16/100.
👥 Class size 0
🌟 Gifted program 30
🎓 Counselors 35
📋 Attendance 0
How this works: Each indicator above is scored 0–100 from federal NCES and CRDC data, then averaged into the Resource Investment Index. This measures resource allocation — staffing, programs, and support services — not standardized test scores or academic outcomes. Full methodology →
The verdict
Robertson Charter School earns an F Resource Investment Index (16/100), with class sizes larger than 100% of Illinois schools.
- F
- Resource Index · 16/100
- 47:1
- large classes for Illinois
- 327
- students enrolled
School address
District: Decatur Sd 61 · Illinois
Public location data per NCES (National Center for Education Statistics) Common Core of Data. Verify the school's current address on the NCES CCD record.
Teachers (FTE)
7.0
Federal CCD staff survey
Students per teacher
47:1
vs 14.6:1 Illinois avg
+222% vs state
Student-teacher ratio in context
How Robertson Charter School compares with Illinois and U.S. medians
The federal record — no proprietary index, no editorial formula.
PlainSchools publishes the actual federal measurements — enrollment, staffing, demographics, discipline, and finance — straight from the NCES Common Core of Data, CRDC, and F-33 surveys. No composite rating, no opinion-based score on top. You get the same raw numbers researchers and policymakers use, with benchmarks, spending context, and equity indicators computed from the same federal datasets. Full methodology linked below.
What this school's NCES data tells you
Robertson Charter School reports 327 enrolled students to the National Center for Education Statistics (NCES) alongside 7.0 full-time-equivalent teachers, producing a 47:1 student-teacher ratio. That figure sits 222% above the Illinois state mean of 14.6:1, signalling larger average class loads than peers in the same state. Against the national 2024-25 average of 15.7:1, it is 199% higher, a useful calibration for families comparing districts across state lines.
Counselor coverage works out to roughly 327 students per counselor, above the ASCA-recommended ceiling of 250:1. Chronic absenteeism — missing 10% or more of school days — stands at 59.0% according to the 2021-22 Civil Rights Data Collection.
On the finance side, the surrounding Decatur Sd 61 spends $16,005 per pupil district-wide, below the Illinois average of $17,042 and below the national average of $16,593. Revenue comes 35.3% from local sources (property taxes), 43.3% from the state, and 21.4% from federal programs per the NCES F-33 finance survey. Taken together, these measurements produce a Resource Investment Index of 16/100 (F), calculated from 4 distinct NCES and CRDC indicators measuring resource allocation rather than academic outcomes.
Source: National Center for Education Statistics Common Core of Data + CRDC + F-33 · 2024-25
How Robertson Charter School compares
Cross-validating school-level NCES values against Illinois state and U.S. national means lets readers see whether this school is an outlier or in line with peers.
| Metric | This school | vs Illinois | Illinois avg | U.S. avg |
|---|---|---|---|---|
| Students per teacher | 47:1 | ▲ 222% | 14.6:1 | 15.7:1 |
| Enrollment | 327 | top 42% | — | — |
Source: NCES Common Core of Data School-level CCD + state/national means from Public School Universe · 2024-25
Class size vs. every US school
Students per teacher (lower means more individual attention)
47 smaller classes than 0% of 92,598 US schools
Each bar is a band; taller bars hold more US schools. The dashed line + filled bar mark this entry. Hover or tap any bar for its full count, share, and where it sits relative to this entry.
Source U.S. Department of Education — NCES Common Core of Data · 2024-25
School size vs. every US school
Total enrollment — where this school sits by size (neither large nor small is 'better')
327 larger than 36% of 95,891 US schools
Each bar is a band; taller bars hold more US schools. The dashed line + filled bar mark this entry. Hover or tap any bar for its full count, share, and where it sits relative to this entry.
Source U.S. Department of Education — NCES Common Core of Data · 2024-25
What the federal data reveals about equity at this school
Federal measurements — not ratings — surface the resource and opportunity picture. Below are the indicators that researchers, civil-rights monitors, and funding formulas use to assess equity.
Staffing depth
47:1
students per teacher
— 222% above state mean
Top 100% in Illinois — lower ratio than 0% of state schools
Above 20:1 — larger class loads than the typical U.S. public school; staffing is stretched relative to enrollment.
Engagement
59.0%
chronically absent (missed 10%+ of school days)
Chronic absenteeism at or above 20% — the CDC threshold for "high" — signals significant barriers to regular attendance.
Funding equity
$16,005
per pupil, district-wide
— below Illinois avg of $17,042
Below the U.S. average per-pupil spend — funding constraints may affect programs, facilities, and staffing.
Support staff
Counselors1.0 FTE
Per 327 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
Enrollment 327 Top 42% in Illinois — larger than 58% of 3,845 state schools
Teachers (FTE) 7.0
Students per teacher 47:1 +222% vs state
Free-lunch eligible —
NCES ID 171185004424
Student demographics
African American 89.3%
Two or More 8.0%
White 1.2%
Hispanic or Latino 0.9%
American Indian / Alaska Native 0.6%
Largest group: African American at 89.3% of enrollment.
Programs & staff
Counselors (FTE) 1.0
Students per counselor 327:1
Discipline & special education
Chronically absent 59.0%
In-school suspensions 0
Out-of-school suspensions 0
Funding & spending
District-wide per-pupil expenditure for Decatur Sd 61, which includes Robertson Charter School.
$16,005
Per student
-6%
vs Illinois
Avg $17,042
-4%
vs U.S.
Avg $16,593
Revenue mix
Local 35.3%
State 43.3%
Federal 21.4%
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.
Other Schools in This District
- Enrollment
- 1,059
- Students per teacher
- 19.7:1
- Enrollment
- 909
- Students per teacher
- 17:1
- Enrollment
- 627
- Students per teacher
- 16.9:1
- Enrollment
- 586
- Students per teacher
- 17.9:1
- Enrollment
- 579
- Students per teacher
- 16.2:1
Similar other schools in Decatur
3 comparable other schools (grades Mixed) serving the same city.
Educator & family resources
In-depth guides on understanding NCES data, school choice, and education funding.
Understanding NCES data
How CCD, CRDC and EDFacts feed every public-school number you see.
Choose a school district
Eight signals that matter more than the overall ranking number.
How schools are funded
Title I, F-33, state aid formulas and what per-pupil spending really means.
Chronic absenteeism
Why missing 10% of school matters and how it varies by district.
Magnet vs charter vs traditional
Three school types, three funding models, three sets of trade-offs.
School discipline data
What CRDC suspension and expulsion records do and don't reveal.
Before you act on this record
Treat this page as the federal baseline — then verify locally.
- Compare Robertson Charter School side-by-side with another school you're considering on the same NCES measures. Compare schools
- Read the district context — spending per pupil, staffing, and equity ranking are district-level decisions that shape this school. District profile
- Confirm current enrollment windows, programs, and boundaries with the school directly — federal data lags the current school year. Choosing guide
Figures are the school's reported federal record (CCD 2024-25, CRDC 2021-22) — coverage varies by entity type, and PlainSchools does not rate or rank schools.
Frequently asked questions about Robertson Charter School
How many students attend Robertson Charter School?
Robertson Charter School has 327 students enrolled. It is a other school in Decatur, IL.
What is the student-teacher ratio at Robertson Charter School?
The student-teacher ratio at Robertson Charter School is 47:1, which is 222% higher than the Illinois average of 14.6:1 and 199% higher than the national average of 15.7:1.
What is the racial and ethnic makeup of Robertson Charter School?
The largest demographic group at Robertson Charter School is African American at 89.3%. The school serves a diverse student body in Decatur, IL.
What is the Resource Investment Index for Robertson Charter School?
Robertson Charter School has a Resource Investment Index of 16/100 (F) based on 4 factors: student-teacher ratio, counselor availability, attendance rates. This index measures federal resource allocation — staffing levels, program availability, and support services — not standardized test scores or academic outcomes.
Is Robertson Charter School a good school?
Robertson Charter School earns an F Resource Investment Index (16/100), with class sizes larger than 100% of Illinois schools. The Resource Investment Index reflects staffing, counselor access, gifted programs, and attendance reported to NCES, not test scores or academic outcomes, so treat it as a resource snapshot rather than an overall rating.