- Enrollment
- 1,059
- Students per teacher
- 18.9:1
- Resource Index
- 25/100
Other / mixed grade configuration · Decatur, IL
Robertson Charter School
Federal NCES profile for Robertson Charter School, including enrollment, faculty, free-lunch eligibility, demographics, and resource indicators - Resource Investment Index 16/100.
2024-25 NCES dataOther / mixed grade configurationNCES 171185004424Charter school
👥 S:T ratio 0
🌟 Gifted program 30
🎓 Counselors 35
📋 Attendance 0
Scored 0–100 from federal NCES and CRDC indicators, resource allocation, not test scores. Full methodology →
The verdict
Robertson Charter School earns 16/100 on the Resource Investment Index, with class sizes larger than 99% of Illinois schools.
- #2 of 4
- schools in Decatur · Resource Index
- 16
- Resource Index · Lower
- 46.7:1
- large classes for Illinois
- 327
- students enrolled
Robertson Charter School has class sizes larger than 99% of Illinois schools. Computed live against every Illinois school reporting to NCES.
By Resource Investment Index, Robertson Charter School ranks #2 of 4 schools in Decatur, IL.
School address
District: Decatur Sd 61 · Illinois
NCES ID 171185004424 Verify on NCES CCD record →
CCD year-over-year · 2022-23 → 2023-24
+3 students YoY
Robertson Charter School held near 332 students from 2022-23 to 2023-24 (+3 headcount).
Teacher FTE lost 7.0 → 6.0 across the same CCD years.
Source: NCES Common Core of Data public-school universe (2022-23, 2023-24).
Steady CCD campus
+3 students YoY 171185004424 · Decatur, IL Other · SMALL · CHARTER
327 enr · 46.7:1 · RII 16
Nearest enrollment peer: Macarthur High School (1,059 students)
Robertson Charter School held near 332 students from 2022-23 to 2023-24 (+3 headcount). Teacher FTE lost 7.0 → 6.0 across the same CCD years. Read with this school → · District book → · Illinois schools → · Find another →
Robertson Charter School in the enrollment neighbourhood
Fall enrollment among this campus and nearest district peers
- Macarthur High
Macarthur High School
1,059 students
- Eisenhower Hig
Eisenhower High School
909 students
- Johns Hill Mag
Johns Hill Magnet School
627 students
- Montessori Aca
Montessori Academy for Peace
586 students
- Dennis Lab Sch
Dennis Lab School
579 students
- This school 327
Robertson Charter School
327 students
What this shows Robertson Charter School reports 327 students on the CCD universe file.
How Robertson Charter School compares
Robertson Charter School held steady on CCD headcount: ratios and free-lunch share vs Illinois and U.S. means.
| Metric | This school | vs Illinois | Illinois avg | U.S. avg |
|---|---|---|---|---|
| Students per teacher | 46.7:1 | ▲ 234% | 14:1 | 15.7:1 |
| Enrollment | 327 | top 58% | - | - |
Source: NCES Common Core of Data School-level CCD + state/national means from Public School Universe · 2024-25
46.7:1
Leaner classes than 0% of US schools, heavier class loads than most.
327
Bigger than 36% of US schools by enrollment, mid-sized for the country.
Equity indicators methodology
Staffing depth
46.7:1
students per teacher
- 234% above state mean
Top 99% in Illinois - lower ratio than 1% of state schools
Well above 20:1, one of the more stretched staffing loads nationally relative to enrollment.
Engagement
59.0%
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
$15,611
per pupil, district-wide
- below Illinois avg of $18,196
Somewhat 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.
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.
Student-body diversity index 19.6/100
Simpson diversity index - at 19.6, Robertson Charter School is less mixed than the Illinois school average of 38.9.
Programs
District finance for Decatur Sd 61 reports $15,611 per pupil (NCES F-33) - open the district page for the full revenue mix.
How Robertson Charter School Compares to District-Mates
| School | Enrollment | Economic Profile | Student-Teacher Ratio |
|---|---|---|---|
| Macarthur High School | Larger | No free-lunch data | Lower S:T ratio |
| Eisenhower High School | Larger | No free-lunch data | Lower S:T ratio |
| Johns Hill Magnet School | Larger | No free-lunch data | Lower S:T ratio |
| Montessori Academy for Peace | Larger | No free-lunch data | Lower S:T ratio |
| Dennis Lab School | Larger | No free-lunch data | Lower S:T ratio |
Comparisons are relative to Robertson Charter School's own figures; each column derives from NCES Common Core of Data.
Other Schools in This District
- Enrollment
- 909
- Students per teacher
- 16.5:1
- Resource Index
- 16/100
- Enrollment
- 627
- Students per teacher
- 16.5:1
- Resource Index
- 30/100
- Enrollment
- 586
- Students per teacher
- 15:1
- Resource Index
- 29/100
- Enrollment
- 579
- Students per teacher
- 17:1
- Resource Index
- 16/100
Similar other schools in Decatur
3 comparable other schools (grades Mixed) serving the same city.
Nationwide other schools with similar size or staffing
Out-of-state peers matched by enrollment and by student-teacher ratio, not the same-city or same-district lists above.
Similar enrollment (~327 students)
Frequently asked questions about Robertson Charter School
How many students attend Robertson Charter School?
Robertson Charter School has 327 students enrolled. It is a public school in Decatur, IL. CCD year-over-year: 329 (2022-23) → 332 (2023-24), nearly flat (+3).
What is the student-teacher ratio at Robertson Charter School?
The student-teacher ratio at Robertson Charter School is 46.7:1, which is 234% higher than the Illinois average of 14:1 and 197% 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% of enrollment, in Decatur, IL.
What is the Resource Investment Index for Robertson Charter School?
Robertson Charter School has a Resource Investment Index of 16/100 (lower reported resources relative to schools nationally) based on 4 factors: student-teacher ratio, gifted-program reporting, counselor availability, chronic absenteeism. Not a test-score or academic measure (national median ~41/100, see methodology).
How does Robertson Charter School rank among schools in Decatur?
By Resource Investment Index, Robertson Charter School ranks #2 of 4 schools in Decatur, IL. This compares federal resource and staffing data among local peers; it is not a test-score or academic ranking. See all schools in Decatur on the city page.
What other schools are in Decatur Sd 61?
Besides Robertson Charter School, Decatur Sd 61 also operates Macarthur High School (1,059 students), Eisenhower High School (909 students), and Johns Hill Magnet School (627 students). See the Decatur Sd 61 district page for the complete list.