- Enrollment
- 534
- Students per teacher
- 19.1:1
- Resource Index
- 41/100
Elementary school (grades K-5) · Arcata, CA
Trillium Charter
Federal NCES profile for Trillium Charter, including enrollment, faculty, free-lunch eligibility, demographics, and resource indicators - Resource Investment Index 25/100.
2024-25 NCES dataElementary school (grades K-5)NCES 062943011947Charter school
👥 S:T ratio 32
🌟 Gifted program 30
📋 Attendance 12
Scored 0–100 from federal NCES and CRDC indicators, resource allocation, not test scores. Full methodology →
The verdict
Trillium Charter earns 25/100 on the Resource Investment Index, even as it posts class sizes smaller than 83% of California schools. It is also one of the smallest schools in California.
- #4 of 6
- elementary schools in Arcata · Resource Index
- 25
- Resource Index · Lower
- 17:1
- small classes for California
- 76.5%
- free-lunch eligible
Trillium Charter has class sizes smaller than 83% of California schools. Computed live against every California school reporting to NCES.
By Resource Investment Index, Trillium Charter ranks #4 of 6 elementary schools in Arcata, CA.
School address
District: Pacific Union Elementary · California
NCES ID 062943011947 Verify on NCES CCD record →
NCES CCD campus card
34 on latest CCD 062943011947 · Arcata, CA Elementary · SMALL · CHARTER
34 enr · 17:1 · 76.5% lunch · RII 25
Nearest enrollment peer: Pacific Union Elementary (534 students)
Resource Investment Index #4 of 6 elementary schools in Arcata. NCES Common Core of Data stamps for this campus. Read with this school → · District book → · California schools → · Find another →
How Trillium Charter compares
Trillium Charter vs California and U.S. means on staffing and lunch eligibility.
| Metric | This school | vs California | California avg | U.S. avg |
|---|---|---|---|---|
| Students per teacher | 17:1 | ▼ 21% | 21.5:1 | 15.7:1 |
| Free-lunch eligible | 76.5% | ▲ 38% | 55.5% | 51.7% |
| Enrollment | 34 | top 95% | - | - |
Source: NCES Common Core of Data School-level CCD + state/national means from Public School Universe · 2024-25
17:1
Leaner classes than 30% of US schools, heavier class loads than most.
34
Bigger than 4% of US schools by enrollment, a small campus.
Equity indicators methodology
Economic need
76.5%
free-lunch eligible
- 38% above the California average of 55.5%
Above the 40% Title I schoolwide threshold; federal funds support the whole school, not individual students.
Staffing depth
17:1
students per teacher
- 21% below state mean
Top 17% in California - lower ratio than 83% of state schools
Between 16:1 and 20:1, squarely in the typical U.S. public-school staffing range.
Engagement
35.3%
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
$11,205
per pupil, district-wide
- below California avg of $18,665
Well below the U.S. average per-pupil spend, a notably leaner funding position that may affect programs, facilities, and staffing.
Support staff
Counselors0.0 FTE
Student-support staffing from the Civil Rights Data Collection.
Discipline context
0
in-school suspensions + 1 out-of-school
Suspension rate: 0.0 per 100 students. Combined in-school and out-of-school rate: 2.9 per 100 students. Reported via the Civil Rights Data Collection.
Programs
District finance for Pacific Union Elementary reports $11,205 per pupil (NCES F-33) - open the district page for the full revenue mix.
How Trillium Charter Compares to District-Mates
| School | Enrollment | Economic Profile | Student-Teacher Ratio |
|---|---|---|---|
| Pacific Union Elementary | Larger | Lower economic need | Higher S:T ratio |
Comparisons are relative to Trillium Charter's own figures; each column derives from NCES Common Core of Data.
Other Schools in This District
Similar elementary schools in Arcata
5 comparable elementary schools (grades K-5) serving the same city.
Pacific Union Elementary
Standard public school
534 students 19.1:1 students per teacher
Arcata Elementary
Standard public school
240 students 16:1 students per teacher
Coastal Grove Charter
Standard public school
235 students 16.8:1 students per teacher
Fuente Nueva Charter
Standard public school
150 students 25:1 students per teacher
Union Street Charter
Standard public school
99 students 19.8:1 students per teacher
Nationwide elementary 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 (~34 students)
Frequently asked questions about Trillium Charter
How many students attend Trillium Charter?
Trillium Charter has 34 students enrolled. It is an elementary school in Arcata, CA.
What is the student-teacher ratio at Trillium Charter?
The student-teacher ratio at Trillium Charter is 17:1, which is 21% lower than the California average of 21.5:1 and 8% higher than the national average of 15.7:1. Lower ratios generally mean more individual attention per student.
What percentage of students receive free lunch at Trillium Charter?
76.5% of students at Trillium Charter are eligible for free lunch, compared to the California average of 55.5%.
What is the Resource Investment Index for Trillium Charter?
Trillium Charter has a Resource Investment Index of 25/100 (lower reported resources relative to schools nationally) based on 3 factors: student-teacher ratio, gifted-program reporting, chronic absenteeism. Not a test-score or academic measure (national median ~41/100, see methodology).
How does Trillium Charter rank among elementary schools in Arcata?
By Resource Investment Index, Trillium Charter ranks #4 of 6 elementary 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 elementary schools in Arcata on the city page.
What other schools are in Pacific Union Elementary?
Besides Trillium Charter, Pacific Union Elementary also operates Pacific Union Elementary (534 students). See the Pacific Union Elementary district page for the complete list.