Enrollment
267
Wisconsin · 2024-25 NCES data
Other / mixed grade configuration · Janesville, WI
Rock River Charter School
Federal NCES profile for Rock River Charter School, including enrollment, faculty, free-lunch eligibility, demographics, and resource indicators - Resource Investment Index 16/100.
2024-25 NCES dataOther / mixed grade configurationNCES 550702001698Charter school
👥 S:T ratio 29
🌟 Gifted program 30
🎓 Counselors 0
📋 Attendance 3
Scored 0–100 from federal NCES and CRDC indicators, resource allocation, not test scores. Full methodology →
The verdict
Rock River Charter School earns 16/100 on the Resource Investment Index, with class sizes larger than 89% of Wisconsin schools.
- #18 of 18
- schools in Janesville · Resource Index
- 16
- Resource Index · Lower
- 17.8:1
- large classes for Wisconsin
- 75.9%
- free-lunch eligible
Rock River Charter School has class sizes larger than 89% of Wisconsin schools. Computed live against every Wisconsin school reporting to NCES.
By Resource Investment Index, Rock River Charter School ranks #18 of 18 schools in Janesville, WI.
School address
District: Janesville School District · Wisconsin
NCES ID 550702001698 Verify on NCES CCD record →
Teachers (FTE)
15.0
Federal CCD staff survey
Students per teacher
17.8:1
vs 14.4:1 Wisconsin avg
+24% vs state
Free-lunch eligible
75.9%
vs 38.5% Wisconsin avg
+97% vs state
Student-teacher ratio in context
How Rock River Charter School compares with Wisconsin and U.S. medians
What stands out at Rock River Charter School
Rock River Charter School is a high-poverty, mid-sized charter combined-grade school in Janesville, Wisconsin, enrolling 267 students.
Class loads run heavy: 17.8:1 is larger than about 89% of Wisconsin schools and 24% above the 14.4:1 state mean, so each teacher carries more students than is typical.
Economic need is high: 75.9% of students qualify for free meals, 97% above the Wisconsin average, a Title I-weighted population that federal funding formulas prioritise.
With 267 students, its enrollment sits close to the Wisconsin median campus size.
Its Resource Investment Index trails 97% of the 2,202 Wisconsin schools with a score on record, one of the lower results on this measure.
Among 99 similarly sized, similarly resourced-need Wisconsin schools statewide, it ranks #98, in the lower tier once campus size and economic need are matched.
Its student body is led by White (64%) and African American (12%) (diversity index 56/100).
Counselor access is stretched at roughly 534 students per counselor, well above the ASCA-recommended 250:1 ceiling.
Chronic absenteeism is elevated: 38.6% of students missed 10% or more of school days (2021-22 Civil Rights Data Collection).
Among Janesville's public schools, it stands alongside Roosevelt Elementary (412 students): Rock River Charter School is smaller than that campus by headcount and runs heavier classes (17.8:1 vs 15.3:1).
Janesville School District also operates Craig High (1,400 students) and Parker High (1,272 students) alongside Rock River Charter 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 Rock River Charter School compares
Rock River Charter School on the metrics families compare, against Wisconsin and U.S. means.
| Metric | This school | vs Wisconsin | Wisconsin avg | U.S. avg |
|---|---|---|---|---|
| Students per teacher | 17.8:1 | ▲ 24% | 14.4:1 | 15.7:1 |
| Free-lunch eligible | 75.9% | ▲ 97% | 38.5% | 51.7% |
| Enrollment | 267 | top 57% | - | - |
Source: NCES Common Core of Data School-level CCD + state/national means from Public School Universe · 2024-25
17.8:1
Leaner classes than 26% of US schools, heavier class loads than most.
267
Bigger than 28% of US schools by enrollment, mid-sized for the country.
Equity indicators (what these measure)
Economic need
75.9%
free-lunch eligible
- 97% above the Wisconsin average of 38.5%
Well above the 40% Title I schoolwide threshold, among the highest-need profiles in the state; federal funds support the whole school, not individual students.
Staffing depth
17.8:1
students per teacher
- 24% above state mean
Top 89% in Wisconsin - lower ratio than 11% of state schools
Between 16:1 and 20:1, squarely in the typical U.S. public-school staffing range.
Engagement
38.6%
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
$13,579
per pupil, district-wide
- below Wisconsin avg of $14,919
Somewhat below the U.S. average per-pupil spend; funding constraints may affect programs, facilities, and staffing.
Support staff
Counselors0.5 FTE
Student-support staffing from the Civil Rights Data Collection.
Discipline context
0
in-school suspensions + 8 out-of-school
Suspension rate: 0.0 per 100 students. Combined in-school and out-of-school rate: 3.0 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 63.7%
African American 12.4%
Two or More 10.9%
Hispanic or Latino 10.1%
Asian 2.6%
American Indian / Alaska Native 0.4%
Largest group: White at 63.7% of enrollment.
Student-body diversity index 55.6/100
Simpson diversity index - at 55.6, Rock River Charter School is more mixed than the Wisconsin school average of 35.7.
Programs
Funding & spending
District-wide per-pupil expenditure for Janesville School District, which includes Rock River Charter School.
$13,579
Per student
-9%
vs Wisconsin
Avg $14,919
-18%
vs U.S.
Avg $16,593
Revenue mix
Local 39.2%
State 49.8%
Federal 11.0%
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 Rock River Charter School Compares to District-Mates
| School | Enrollment | Economic Profile | Student-Teacher Ratio |
|---|---|---|---|
| Craig High | Larger | Lower economic need | Lower S:T ratio |
| Parker High | Larger | Lower economic need | Lower S:T ratio |
| Marshall Middle | Larger | Lower economic need | Lower S:T ratio |
| Edison Middle | Larger | Lower economic need | Lower S:T ratio |
| Franklin Middle | Larger | Lower economic need | Lower S:T ratio |
Comparisons are relative to Rock River Charter School's own figures; each column derives from NCES Common Core of Data.
Other Schools in This District
- Enrollment
- 1,400
- Students per teacher
- 12.5:1
- Resource Index
- 30/100
- Enrollment
- 1,272
- Students per teacher
- 13.1:1
- Resource Index
- 23/100
- Enrollment
- 747
- Students per teacher
- 14.1:1
- Resource Index
- 36/100
- Enrollment
- 587
- Students per teacher
- 12.8:1
- Resource Index
- 43/100
- Enrollment
- 486
- Students per teacher
- 10.1:1
- Resource Index
- 45/100
Similar other schools in Janesville
6 comparable other schools (grades Mixed) serving the same city.
Roosevelt Elementary
Standard public school
412 students 15.3:1 students per teacher
Washington Elementary
Standard public school
410 students 15.2:1 students per teacher
Van Buren Elementary
Standard public school
408 students 14.6:1 students per teacher
Kennedy Elementary
Standard public school
404 students 15:1 students per teacher
Monroe Elementary
Standard public school
376 students 14.5:1 students per teacher
Preschool 4 Janesville
Standard public school
345 students 20.3:1 students per teacher
Similar other schools statewide
Matched by enrollment size and by staffing ratio across all of Wisconsin, not just this city - a different peer set than the local comparisons above.
Similar enrollment (~267 students)
Next steps
Verify locally before acting on Rock River Charter School's federal record.
- Compare Rock River Charter School against another school. Compare schools
- Janesville School District'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 Rock River Charter School
How many students attend Rock River Charter School?
Rock River Charter School has 267 students enrolled. It is an alternative school in Janesville, WI.
What is the student-teacher ratio at Rock River Charter School?
The student-teacher ratio at Rock River Charter School is 17.8:1, which is 24% higher than the Wisconsin average of 14.4:1 and 13% higher than the national average of 15.7:1.
What percentage of students receive free lunch at Rock River Charter School?
75.9% of students at Rock River Charter School are eligible for free lunch, compared to the Wisconsin average of 38.5%.
What is the racial and ethnic makeup of Rock River Charter School?
The largest demographic group at Rock River Charter School is White at 63.7% of enrollment, in Janesville, WI. Its student body is more racially and ethnically mixed than most US schools, with a diversity index of 55.6/100.
What is the Resource Investment Index for Rock River Charter School?
Rock River Charter School has a Resource Investment Index of 16/100 (lower 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 Rock River Charter School rank among schools in Janesville?
By Resource Investment Index, Rock River Charter School ranks #18 of 18 schools in Janesville, WI. This compares federal resource and staffing data among local peers; it is not a test-score or academic ranking. See all schools in Janesville on the city page.
Is Rock River Charter School a good school?
Rock River Charter School earns 16/100 on the Resource Investment Index, with class sizes larger than 89% of Wisconsin 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 Janesville School District?
Besides Rock River Charter School, Janesville School District also operates Craig High (1,400 students), Parker High (1,272 students), and Marshall Middle (747 students). See the Janesville School District 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.