Enrollment
109
California · 2024-25 NCES data
High school (grades 9-12) · Arcata, CA
Six Rivers Charter High
Federal NCES profile for Six Rivers Charter High, including enrollment, faculty, free-lunch eligibility, demographics, and resource indicators - Resource Investment Index 10/100.
2024-25 NCES dataHigh school (grades 9-12)NCES 060303010800Charter school
👥 S:T ratio 13
📚 AP courses 5
🌟 Gifted program 30
🎓 Counselors 0
📋 Attendance 2
Scored 0–100 from federal NCES and CRDC indicators, resource allocation, not test scores. Full methodology →
The verdict
Six Rivers Charter High earns 10/100 on the Resource Investment Index, with class sizes near the California median.
- #3 of 3
- high schools in Arcata · Resource Index
- 10
- Resource Index · Lower
- 21.8:1
- students per teacher
- 32.1%
- free-lunch eligible
Six Rivers Charter High has class sizes near the California median. Computed live against every California school reporting to NCES.
By Resource Investment Index, Six Rivers Charter High ranks #3 of 3 high schools in Arcata, CA.
School address
District: Northern Humboldt Union High · California
NCES ID 060303010800 Verify on NCES CCD record →
Teachers (FTE)
5.0
Federal CCD staff survey
Students per teacher
21.8:1
vs 21.5:1 California avg
+1% vs state
Free-lunch eligible
32.1%
vs 55.5% California avg
-42% vs state
Student-teacher ratio in context
How Six Rivers Charter High compares with California and U.S. medians
What stands out at Six Rivers Charter High
Six Rivers Charter High is a small charter high school in Arcata, California, enrolling 109 students.
At 21.8:1, its student-teacher ratio sits close to the California median, within a few percentage points of the 21.5:1 state norm, neither notably crowded nor notably small.
Economic need runs somewhat below the state's typical profile, with 32.1% of students eligible for free meals.
Enrollment of 109 puts it in the smaller third of California schools by headcount.
Its Resource Investment Index trails 96% of the 9,998 California schools with a score on record, one of the lower results on this measure.
Among 156 similarly sized, similarly resourced-need California schools statewide, it ranks #151, in the lower tier once campus size and economic need are matched.
On the academic-pipeline side it reports 1 Advanced Placement course.
Counselor access is stretched at roughly 1090 students per counselor, well above the ASCA-recommended 250:1 ceiling.
Chronic absenteeism is elevated: 39.4% of students missed 10% or more of school days (2021-22 Civil Rights Data Collection).
Among Arcata's high schools, it stands alongside Arcata High (1,007 students): Six Rivers Charter High is smaller than that campus by headcount and runs heavier classes (21.8:1 vs 19.7:1).
Northern Humboldt Union High also operates Arcata High (1,007 students) and Mckinleyville High (566 students) alongside Six Rivers Charter High.
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 Six Rivers Charter High compares
Six Rivers Charter High on the metrics families compare, against California and U.S. means.
| Metric | This school | vs California | California avg | U.S. avg |
|---|---|---|---|---|
| Students per teacher | 21.8:1 | ▲ 1% | 21.5:1 | 15.7:1 |
| Free-lunch eligible | 32.1% | ▼ 42% | 55.5% | 51.7% |
| Enrollment | 109 | top 89% | - | - |
Source: NCES Common Core of Data School-level CCD + state/national means from Public School Universe · 2024-25
21.8:1
Leaner classes than 11% of US schools, heavier class loads than most.
109
Bigger than 11% of US schools by enrollment, a small campus.
Equity indicators (what these measure)
Economic need
32.1%
free-lunch eligible
- 42% below the California average of 55.5%
Below the 40% Title I threshold; federal aid targets individual qualifying students rather than schoolwide programs.
Staffing depth
21.8:1
students per teacher
- 1% above state mean
Top 51% in California - lower ratio than 49% of state schools
Above 20:1, running heavier than the typical U.S. public school; staffing is comparatively stretched.
Engagement
39.4%
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
$15,321
per pupil, district-wide
- below California avg of $16,509
Somewhat below the U.S. average per-pupil spend; funding constraints may affect programs, facilities, and staffing.
Support staff
Counselors0.1 FTE
Student-support staffing from the Civil Rights Data Collection.
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.
Programs
AP courses offered 1
Funding & spending
District-wide per-pupil expenditure for Northern Humboldt Union High, which includes Six Rivers Charter High.
$15,321
Per student
-7%
vs California
Avg $16,509
-8%
vs U.S.
Avg $16,593
Revenue mix
Local 43.3%
State 45.8%
Federal 10.9%
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 Six Rivers Charter High Compares to District-Mates
| School | Enrollment | Economic Profile | Student-Teacher Ratio |
|---|---|---|---|
| Arcata High | Larger | Similar economic need | Lower S:T ratio |
| Mckinleyville High | Larger | Higher economic need | Lower S:T ratio |
| Mad River High (Continuation) | Smaller | Higher economic need | Lower S:T ratio |
| Pacific Coast High (Continuation) | Smaller | Higher economic need | Lower S:T ratio |
Comparisons are relative to Six Rivers Charter High's own figures; each column derives from NCES Common Core of Data.
Other Schools in This District
- Enrollment
- 1,007
- Students per teacher
- 19.7:1
- Resource Index
- 28/100
- Enrollment
- 566
- Students per teacher
- 18.3:1
- Resource Index
- 24/100
- Enrollment
- 28
- Students per teacher
- 14:1
- Resource Index
- 37/100
- Enrollment
- 24
- Students per teacher
- 12:1
- Resource Index
- 27/100
Similar high schools in Arcata
2 comparable high schools (grades 9-12) serving the same city.
Similar high schools statewide
Matched by enrollment size and by staffing ratio across all of California, not just this city - a different peer set than the local comparisons above.
Similar enrollment (~109 students)
Similar student-teacher ratio (~21.8:1)
Next steps
Verify locally before acting on Six Rivers Charter High's federal record.
- Compare Six Rivers Charter High against another school. Compare schools
- Northern Humboldt Union High'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 Six Rivers Charter High
How many students attend Six Rivers Charter High?
Six Rivers Charter High has 109 students enrolled. It is a high school in Arcata, CA.
What is the student-teacher ratio at Six Rivers Charter High?
The student-teacher ratio at Six Rivers Charter High is 21.8:1, which is 1% higher than the California average of 21.5:1 and 39% higher than the national average of 15.7:1.
What percentage of students receive free lunch at Six Rivers Charter High?
32.1% of students at Six Rivers Charter High are eligible for free lunch, compared to the California average of 55.5%.
What is the Resource Investment Index for Six Rivers Charter High?
Six Rivers Charter High has a Resource Investment Index of 10/100 (lower reported resources relative to schools nationally) based on 5 factors: student-teacher ratio, AP course offerings, counselor availability, attendance rates. Not a test-score or academic measure (national median ~41/100, see methodology).
How does Six Rivers Charter High rank among high schools in Arcata?
By Resource Investment Index, Six Rivers Charter High ranks #3 of 3 high schools in Arcata, CA. This compares federal resource and staffing data among local peers; it is not a test-score or academic ranking. See all high schools in Arcata on the city page.
Is Six Rivers Charter High a good school?
Six Rivers Charter High earns 10/100 on the Resource Investment Index, with class sizes near the California 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 Northern Humboldt Union High?
Besides Six Rivers Charter High, Northern Humboldt Union High also operates Arcata High (1,007 students), Mckinleyville High (566 students), and Mad River High (Continuation) (28 students). See the Northern Humboldt Union High 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.