Independent charter school · Pacific Union Elementary

Trillium Charter

1464 Spear Avenue, Arcata · 40 students · Grades TK–5

Campus map · © OpenStreetMap

Drawn from OpenStreetMap, inside the campus outline from the California School Campus Database (2025). Volunteers map it, so a new building may be missing. Buildings with no mapped height are drawn one storey high.

A picture of the campus, not an attendance boundary or a rating.

Schools maintain a closed campus policy. For students’ safety, visitors may enter a campus only with the school’s official permission; this drawing implies no permission to enter.

Trillium Charter is a charter school for grades K–5. We don't have a 2026 Scope Score for it.

In its own words

What does Trillium Charter say about itself?

We haven’t read Trillium Charter’s website yet. Until we do, the school’s own site is the best place to hear it in its own words.

Open trilliumcharter.org (opens in a new tab)

Who goes here

Who goes here?

White students are the largest group here, at 62% of students. 16 of 53 students missed 10% or more of school days.

Missing school, 2025–26

16of 53

students were chronically absent. That means they missed 10% or more of school days. That is 30 in 100.

Students, 2024–25

40

students in grades TK–5.

White 62%Hispanic or Latino 25%

Family income

88%

of students qualified for free or reduced-price meals in 2024–25, 35 of 40. California: 63%.

Teachers, 2024–25

3

teachers, with 14 years of experience on average.

0% were in their first year.

100% of teaching positions had the right credential, 2021–22.

Suspensions, 2025–26

10.5%

of students were suspended at least once (6 of 57).

Sources: California Department of Education. Each tile names its year.

Full student mix, 2025–26
StudentsHere
White62%
Hispanic or Latino25%
Asian—
Black or African American—
Filipino—
Two or more races—
American Indian or Alaska Native—
Pacific Islander—
Not reported—
Where these figures come from

Attendance and suspensions: California Department of Education, 2025–26. Student mix: the students the state’s attendance file counts, 2025–26; a dash means our records hold no count. Student count: California Department of Education enrollment, 2024–25. Teachers: California Department of Education staffing files, 2024–25.

Teaching credentials: California’s School Accountability Report Card, 2024–25, measured in 2021–22: 2 of 2 full-time teaching positions. It counts positions, not individual teachers.

The school day

What is the school day like?

Trillium Charter has transitional kindergarten (TK). Our records do not hold school hours or before- and after-school care yet. Ask the office.

Transitional kindergarten (TK), 2025–26

5

TK students in 2025–26.

TK is California’s free public program for four-year-olds.

TK count: California Department of Education, Census Day enrollment, 2025–26. Find TK schools near you

The neighborhood

What is the area around Trillium Charter like?

These figures are for everyone who lives in ZIP code 95521. They are not figures for the families at Trillium Charter.

Typical household income in a year

$53,114

Typical means half are higher and half are lower. The ZIP code is the school’s address, not its attendance area. Source: U.S. Census Bureau, American Community Survey, 2020–2024, ZIP code area 95521.

Typical home value
$501,000
People who live in this ZIP code
21,980
Typical age
29.2 years
Adults 25 and older with a four-year college degree
46%

What you can do

Who can act on Trillium Charter’s results?

Trillium Charter’s own board decides its plan.

State support

The state hasn’t placed Trillium Charter in a support program. Federal designation under the Every Student Succeeds Act, 2025–26. Source 

Reading screening in kindergarten through grade 2

California law requires schools to screen kindergartners through second graders for reading difficulties every year, with some exceptions. You get notice at least 15 days before, results within 45 days, and can opt out in writing.

Kindergartners can’t be screened before the 91st school day; transitional kindergarten isn’t covered.

If screening shows your child may be at risk for reading difficulties, the school must provide supports. That result isn’t a diagnosis, and screening can’t be used to delay a special-education evaluation.

Ask how many K–2 students screening found at risk last year, and how many got extra reading help.

California Education Code § 53008. Source 

Questions to ask

What should I ask, and when?

Bring these 5 questions to Trillium Charter. Confirm anything about applying with the school itself.

On a tour

  1. How do you support kids who arrive ahead, and kids who arrive behind?

Before you apply

  1. Which grades are accepting applications, and who is eligible?
  2. What are the deadlines, enrollment priorities, and lottery or waitlist steps?

At the office

  1. What time does the day start and end, and is any day shorter?
  2. What transportation and before- or after-school options are available?

Ask families and staff yourselfWhat to ask the people at Trillium Charter

Ask current families how the school keeps them informed, and what happened when their child needed help. Ask staff how long teachers tend to stay.

Questions for your visit ↓

Getting in

How do I get in?

Ask Trillium Charter how it admits students. Charter schools set their own enrollment steps and dates.

Where it is

Where is Trillium Charter?

Address
1464 Spear Avenue, Arcata 95521Get directions (opens Google Maps in a new tab)
Administrator
Marianne KellerAs the state’s school directory lists it, last updated August 8, 2023.

A school’s place on the map is its address in the state directory. It does not show which homes the school serves. See nearby schools on the map

Short answers to 3 common questions

How do I get in?

Ask Trillium Charter how it admits students. Charter schools set their own enrollment steps and dates. See the details ↓

How often do students miss school or get suspended?

16 of 53 students were chronically absent in 2025–26, meaning they missed 10% or more of school days. 10.5% of students (6 of 57) were suspended at least once in 2025–26. See the details ↓

How do I visit Trillium Charter?

Call the office at (707) 822-4721 to ask about a visit. Questions to bring are under Questions to ask. See the details ↓

Its own plan

What does Trillium Charter’s own plan commit to?

$927,550 is planned for 19 funded actions in 3 goals. These are planned amounts; the charter school reports what it spent in a later plan.

$927,550

planned in the school’s own plan for 2026–27

The three largest actions in the plan

  • Appropriately assigned teachers$189,167
  • School Administration$183,924
  • School Nutrition Program$78,381

Source: the charter school’s yearly spending plan (Local Control and Accountability Plan, or LCAP, 72 pages), as posted to the California School Dashboard.

The whole plan: every goal, what it measures and what it pays for

The plan lists what the school commits to spend and measure.

The 2026–27 plan in short

Source: the charter school’s yearly spending plan (Local Control and Accountability Plan, or LCAP, 72 pages), as posted to the California School Dashboard.

Where the money goes

Three actions take 49% of the money. The plan itself puts 71% of it toward staff.

  • Appropriately assigned teachers $189,167
  • School Administration $183,924
  • School Nutrition Program $78,381
  • 16 other actions
Reading, math and catch-up help

1 of the plan’s 19 funded actions names reading, math, catch-up help or English learners in its title.

  • Catch-up help $46,061

Largest of these

  • Academic interventions$46,061
For high-need students

It plans $281,413 in extra services for English learners, low-income students and foster youth. For 2025–26, it planned $308,162 and estimates it spent $308,162, the same as planned.

What changed

The total is $133,432 (17%) higher than in the 2025–26 plan. The biggest change in dollars is Facilities, maintenance, and safety, which went from $36,320 to $74,093.

Largest cuts

  • Family support & services−⁠$11,389
  • Appropriately assigned teachers−⁠$4,421
  • Student engagement−⁠$4,401

Largest increases

  • Facilities, maintenance, and safety+⁠$37,773
  • School Nutrition Program+⁠$27,804
  • Classroom aides and support staff+⁠$24,668
What its goals measure

Read these state results for this school as context for the goals they measure; results alone can’t show what the plan caused.

The test rows are schoolwide results for every grade the school tests; the source doesn’t list which grades.

What its goals measure: state results, 2024–25 and 2025–26
Measure2024–252025–26Change
Chronically absentGoal 129 in 10030 in 1001 more in 100
Suspended at least onceGoal 24.0%10.5%up 6.5 pts

Goal 3 isn’t shown because it tracks named schools.

Figures from CDE’s state test, chronic absence and suspension files. Test figures cover every grade the school tests (California tests grades 3–8 and 11), so they differ from a profile’s rated grades. Chronically absent means a student missed 10% or more of school days.

The plan’s own titles and amounts
  • Appropriately assigned teachers · $189,167
  • School Administration · $183,924
  • School Nutrition Program · $78,381
The full plan3 goals, 22 measures and where the money goes

We calculate each action’s share of the plan by dividing its planned amount by the total of the plan’s funded actions ($927,550).

Where does the money go?

51% to Goal 2. Each box is one action, sized by its planned dollars and coloured by its change since last year’s plan. Tap a box to open its goal.

G1
G2

Change since the 2025–26 plan, same title

  • fell 25% or more
  • fell 10–25%
  • fell 2–10%
  • within 2%
  • grew 2–10%
  • grew 10–25%
  • grew 25% or more
  • new or renamed title
  • not compared: unconfirmed, or repeated across goals

Every goal, in the plan’s order

Goal 1Trillium students will demonstrate continued growth and achievement in academics, social- emotional…$415,99045% of action budgets

“Trillium students will demonstrate continued growth and achievement in academics, social- emotional development, and community engagement through access to high-quality instruction, curriculum, assessments, and support services provided by school staff and community partners” p. 10 ↗

10 funded actions · 2025–26 plan: $373,095 (+⁠$42,895)

Largest funded actions

  1. School Administration$183,924action 1.10 · p. 34 ↗ · marked as contributing to high-need services
  2. Special education$69,715action 1.5 · p. 33 ↗
  3. NCBIS and Independent study$46,245action 1.2 · p. 33 ↗ · marked as contributing to high-need services
  4. Academic interventions$46,061action 1.4 · p. 33 ↗
  5. Attendance Monitoring & Support$35,388action 1.7 · p. 33 ↗ · marked as contributing to high-need services · of which $33,238 is state funding counted toward those services

5 more funded actions in this goal

  • Instructional materials & supplies · action 1.1 · p. 33 ↗ · marked as contributing to high-need services$15,000
  • Art & Music integration · action 1.11 · p. 34 ↗$7,914
  • Assessments and progress monitoring · action 1.3 · p. 33 ↗$6,942
  • Behavior Support · action 1.6 · p. 33 ↗$3,000
  • Students experiencing homelessness · action 1.9 · p. 34 ↗$1,800

Changes from last year’s plan, same title

  1. Academic interventions+⁠$15,848$30,213 → $46,061 · p. 33 ↗
  2. School Administration+⁠$13,887$170,037 → $183,924 · p. 34 ↗
  3. Special education+⁠$11,639$58,076 → $69,715 · p. 33 ↗

Every other line in this goal, against last year’s plan

  • NCBIS and Independent study · $46,476 → $46,245 · p. 33 ↗−⁠$231
  • Attendance Monitoring & Support · $35,375 → $35,388 · p. 33 ↗+⁠$13
  • Instructional materials & supplies · $18,142 → $15,000 · p. 33 ↗−⁠$3,142
  • Art & Music integration · $5,000 → $7,914 · p. 34 ↗+⁠$2,914
  • Assessments and progress monitoring · $4,975 → $6,942 · p. 33 ↗+⁠$1,967
  • Behavior Support · $3,000 → $3,000 · p. 33 ↗unchanged
  • Students experiencing homelessness · $1,800 · p. 34 ↗new or renamed

A reworded title counts as new.

How the plan measures it · 11 measures

None of these has an all-students line we can quote; the plan’s table lists them from p. 10 ↗.

Goal 2Trillium will foster a positive, collaborative, and engaged school culture by maintaining a highly- qualified…$472,23951% of action budgets

“Trillium will foster a positive, collaborative, and engaged school culture by maintaining a highly- qualified staff, providing continual opportunities for professional development, and through collaborative partnering with families and the community to enrich student learning experiences” p. 18 ↗

8 funded actions · reworded since the 2025–26 plan

Largest funded actions

  1. Appropriately assigned teachers$189,167action 2.1 · p. 34 ↗
  2. School Nutrition Program$78,381action 2.6 · p. 34 ↗ · marked as contributing to high-need services · of which $25,000 is state funding counted toward those services
  3. Facilities, maintenance, and safety$74,093action 2.4 · p. 34 ↗
  4. Classroom aides and support staff$60,669action 2.2 · p. 34 ↗ · marked as contributing to high-need services · of which $39,251 is state funding counted toward those services
  5. Extended Learning Opportunities$58,929action 2.7 · p. 35 ↗

3 more funded actions in this goal

  • Professional development & training · action 2.3 · p. 34 ↗$5,000
  • Family engagement and input · action 2.8 · p. 35 ↗$3,500
  • Student engagement · action 2.9 · p. 35 ↗$2,500

Changes from last year’s plan, same title

  1. Facilities, maintenance, and safety+⁠$37,773$36,320 → $74,093 · p. 34 ↗
  2. School Nutrition Program+⁠$27,804$50,577 → $78,381 · p. 34 ↗
  3. Classroom aides and support staff+⁠$24,668$36,001 → $60,669 · p. 34 ↗

Every other line in this goal, against last year’s plan

  • Appropriately assigned teachers · $193,588 → $189,167 · p. 34 ↗−⁠$4,421
  • Extended Learning Opportunities · $43,227 → $58,929 · p. 35 ↗+⁠$15,702
  • Professional development & training · $200 → $5,000 · p. 34 ↗+⁠$4,800
  • Family engagement and input · $3,500 → $3,500 · p. 35 ↗unchanged
  • Student engagement · $6,901 → $2,500 · p. 35 ↗−⁠$4,401

How the plan measures it · 10 measures

None of these has an all-students line we can quote; the plan’s table lists them from p. 18 ↗.

Goal 3 · Equity Multiplier Focus GoalTrillium will provide material support services for low-income and McKinney-Vento students and maintain a…$39,3204% of action budgets

“Trillium will provide material support services for low-income and McKinney-Vento students and maintain a high completion rate for students who transfer in mid-year. Trillium will encourage school stability by re-enrolling eligible students during a priority enrollment period for returning students” p. 26 ↗

1 funded action · reworded since the 2025–26 plan

Largest funded actions

  1. Family support & services$39,320action 3.1 · p. 35 ↗ · marked as contributing to high-need services

Changes from last year’s plan, same title

  1. Family support & services−⁠$11,389$50,709 → $39,320 · p. 35 ↗

How the plan measures it · 1 measure

None of these has an all-students line we can quote; the plan’s table lists them from p. 26 ↗.

All amounts are planned. We read them from the PDF and added up each goal’s actions ourselves. Page links open the plan at that page.

The full record

Source records

This page is built from 9 sets of records from public data sources. Every figure keeps its source, grades, year and count.

Data updated

October 15, 2026

Record sets on this page
9
Sources
California Department of EducationU.S. Census Bureau
State test years
2017–2026

Results

Students

Money and staff

Place, downloads and method

CDE assessment recordsCDE CAASPP 2026 · every level, as published · raw grade–subject rows

What each level means: California's level descriptions.

All Grades is an aggregate, not another group of students. Same-year grade groups are not matched children. A grade the school doesn't teach has no row. “Suppressed” marks a result CDE blanks because fewer than 11 students tested (CDE’s reporting rule); “none tested” marks a grade CDE lists with no students tested; “not on file” marks a result missing from the records we hold. None of them means zero.

CDE CAASPP test year 2026 · all-students reporting group · publisher grade–subject records.
Grade · subjectStudents tested with scoresProficient or AdvancedAdvancedProficientDeveloping levelMinimalMean scale score
Grade 3 · ELA · 20269suppressedsuppressedsuppressedsuppressedsuppressedsuppressed
Grade 4 · ELA · 20266suppressedsuppressedsuppressedsuppressedsuppressedsuppressed
Grade 5 · ELA · 20266suppressedsuppressedsuppressedsuppressedsuppressedsuppressed
All Grades · ELA · 20262147.62%19.05%28.57%23.81%28.57%not on file
Grade 3 · Math · 20269suppressedsuppressedsuppressedsuppressedsuppressedsuppressed
Grade 4 · Math · 20266suppressedsuppressedsuppressedsuppressedsuppressedsuppressed
Grade 5 · Math · 20266suppressedsuppressedsuppressedsuppressedsuppressedsuppressed
All Grades · Math · 20262138.1%19.05%19.05%47.62%14.29%not on file

CDE CAASPP 2026: 6 individual grade–subject records; 6 records with a positive known tested count.

0 grade–subject counts unavailable; 6 grade–subject attainment rates unavailable.

Results by gradeEnglish and math · grades 3–5 · spring 2026 · % of tested students

English · 2025–26 results by grade

Share of students tested, spring 2026
EnglishTestedAdvancedProficientDeveloping levelMinimalProficient or Advanced
Grade 39suppressedsuppressedsuppressedsuppressedsuppressed
Grade 46suppressedsuppressedsuppressedsuppressedsuppressed
Grade 56suppressedsuppressedsuppressedsuppressedsuppressed

Math · 2025–26 results by grade

Share of students tested, spring 2026
MathTestedAdvancedProficientDeveloping levelMinimalProficient or Advanced
Grade 39suppressedsuppressedsuppressedsuppressedsuppressed
Grade 46suppressedsuppressedsuppressedsuppressedsuppressed
Grade 56suppressedsuppressedsuppressedsuppressedsuppressed

A grade the school doesn't teach has no row. “Suppressed” marks a result CDE blanks because fewer than 11 students tested (CDE’s reporting rule); “none tested” marks a grade CDE lists with no students tested; “not on file” marks a result missing from the records we hold. None of them means zero.

Every tested year2017–2026 · rates, tested counts, and each grade

English and math by test year · all tested grades

Year · subjectStudents with scoresTop levelTop two levels
2026 · English2119%48%
2026 · Math2119%38%
2025 · English1937%63%
2025 · Math1926%42%
2024 · English1612%31%
2024 · Math1712%24%
2023 · English1429%57%
2023 · Math1527%47%
2022 · English1937%58%
2022 · Math1911%32%
2019 · English2124%67%
2019 · Math2110%33%
2018 · English2524%60%
2018 · Math2520%36%
2017 · English2330%61%
2017 · Math239%48%

Each year names its school year end (2026 = 2025–26). “Students with scores” counts each subject on its own, so don’t add the English and math counts together. A dash is unavailable, not zero.

Earlier years · grade and subject

Year · grade · subjectStudents with scoresMet or exceeded
2025 · Grade 3 · English8—
2025 · Grade 4 · English9—
2025 · Grade 5 · English——
2025 · Grade 3 · Math8—
2025 · Grade 4 · Math9—
2025 · Grade 5 · Math——
2024 · Grade 3 · English8—
2024 · Grade 4 · English——
2024 · Grade 5 · English6—
2024 · Grade 3 · Math8—
2024 · Grade 4 · Math——
2024 · Grade 5 · Math7—
2023 · Grade 3 · English——
2023 · Grade 4 · English6—
2023 · Grade 5 · English6—
2023 · Grade 3 · Math——
2023 · Grade 4 · Math7—
2023 · Grade 5 · Math6—
2022 · Grade 3 · English8—
2022 · Grade 4 · English5—
2022 · Grade 5 · English6—
2022 · Grade 3 · Math8—
2022 · Grade 4 · Math5—
2022 · Grade 5 · Math6—
2019 · Grade 3 · English7—
2019 · Grade 4 · English7—
2019 · Grade 5 · English7—
2019 · Grade 3 · Math7—
2019 · Grade 4 · Math7—
2019 · Grade 5 · Math7—
2018 · Grade 3 · English——
2018 · Grade 4 · English——
2018 · Grade 5 · English——
2018 · Grade 3 · Math——
2018 · Grade 4 · Math——
2018 · Grade 5 · Math——
2017 · Grade 3 · English——
2017 · Grade 4 · English——
2017 · Grade 5 · English——
2017 · Grade 3 · Math——
2017 · Grade 4 · Math——
2017 · Grade 5 · Math——

Current 2025–26 grade results appear above. “Students with scores” counts the students tested in that grade, subject and year. A missing result is not zero, and each year’s row is a different group of children.

Science (CAST)schoolwide · spring 2026
Science (CAST)TestedAdvancedProficientDeveloping levelMinimal
Schoolwide6————

CAST is California’s science test, reported apart from English and math.

Attendance and suspensionsState records · this school and each student group · 2018–19 and 2025–26

CDE’s all-students school rates for 2024–25 and 2025–26; the change is the difference between the two rates as printed.

Year-over-year school rates
Chronic absenteeism2024–25 · 14 of 48 → 2025–26 · 16 of 53
Suspension rate2024–25 · 4.0% (2 of 50) → 2025–26 · 10.5% (6 of 57) · +6.5 percentage points
Group2018–192025–26
Female4 of 207 of 17
Male7 of 269 of 36
White5 of 308 of 33
Low-income9 of 3615 of 43
All students11 of 4616 of 53
Hispanic or Latino—5 of 13
Students with disabilities—6 of 18

Two reported school years only; no intervening-year result is implied. Where fewer than 100 students were counted, the cell shows the count and no change is printed. Source: CDE school-level chronic absenteeism by student group.

Fundingschool and district spending, from state and federal finance records · each row names its fiscal year and measure

Per-pupil spending

District · current expense$8,900 per pupil

NCES F-33 · FY 2020–21 (2021) · fall district membership: 589 pupils

California · selected district mean$14,491 per pupil

NCES F-33 · FY 2020–21 (2021) · SchoolScope’s unweighted mean across 818 selected California district finance records

School-level federal expenditures$1,418 per pupil

CDE ESSA · school-attributed per-pupil record · FY 2024–25 (2025) · source denominator: 40

Central federal expenditures attributed here$206 per pupil

CDE ESSA · central expenditures attributed to this school · FY 2024–25 (2025) · source denominator: 40

District current expense · FY 2024–25$16,396 per ADA

CDE SACS Current Expense of Education · district fiscal year ending 2025 · average daily attendance denominator

These figures are not directly comparable: school ESSA attributed spending and NCES district current expense use different measures and populations. Their fiscal years are labeled above.

How the California mean was selected

SchoolScope starts with its selected California finance records, not every NCES California district. For FY 2020–21, it calculates an unweighted mean of NCES F-33 current expense per pupil. District records contribute once, regardless of enrollment. The calculation keeps records with positive per-pupil current expense, enrollment over 100, CCD agency type 1, and a recorded district name; it excludes names ending in County Office of Education, Department of Education, or Superintendent of Schools. This is a SchoolScope calculation, not a state-published spending average.

Selected General Fund operating costs · FY 2024–⁠25 · SchoolScope calculation
Instruction 69%Instruction support 8%Student services 7%Administration 7%Buildings & maintenance 9%
The arithmetic behind these shares · FY 2024–25
GroupDollarsShare, to two decimalsPrinted
Instruction$5,459,57169.38%69%
Instruction support$584,0467.42%8%
Student services$576,1087.32%7%
Administration$546,2756.94%7%
Buildings & maintenance$671,6048.53%9%
Total$7,869,378100.00%100%

These shares are our arithmetic: each group’s dollars divided by the $7,869,378 total of the groups shown, rounded to whole percents by largest remainder so they add up to 100. Dollar amounts are rounded to the nearest dollar, so they can differ from the total by a dollar. SchoolScope groups district-level CDE SACS UserGL actuals from Fund 01, using operating objects 1000–5999 and excluding retiree benefits, food and community services, facilities acquisition, other outgo, and nonagency goals. These shares use that filtered total; they do not exactly break down CDE's official current expense per ADA above. The school-level ESSA figure uses a separate source.

NCES F-33 district fiscal-year history, 2017–⁠2021; latest district record shown: 2021
2021$8,900 per pupil
2020$8,435 per pupil
2019$9,756 per pupil
2018$8,186 per pupil
2017$8,190 per pupil
Staffing recordsstate teacher credential-and-placement and district salary records · each for its own year

Additional workforce records

Properly assigned intern credential holders0.0%

CDE 2024–25 SARC, Teacher Preparation and Placement table; measured school year 2021–22. Share of reported school teaching-position full-time equivalents assigned to properly assigned intern credential holders. A reported 0.0% is shown; unavailable rates are omitted. This is a position share, not a count of current teachers or of emergency permits.

The surrounding ZIP codeCensus Bureau survey, 2020–2024 · ZIP 95521 · not the school’s students
American Community Survey 5-year estimates · 2020–2024 · ZIP 95521 area
MeasureEstimate
Median household income$53,114
Bachelor's degree or higher (adults 25+)46%
ZIP-area population21,980
Median age29.2 years

Source: U.S. Census Bureau, American Community Survey, 2020–2024 5-year estimates. Median household income covers the past 12 months and is reported in 2024 inflation-adjusted dollars. Bachelor's degree or higher uses adults age 25 and over as its population. A dash is unavailable, not zero; a reported zero remains zero. ZIP-area figures do not establish the school's attendance area or describe its enrolled students. See all schools in ZIP code 95521 →

Downloads and methodologyCSV · sources · corrections

Data sources: public data sources, including the California Department of Education · state tests (CAASPP) 2025–26 · Census survey (ACS) 2020–2024 · staffing and finance name their own sources and years beside each figure · Data updated October 15, 2026.