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Trillium Charter School

Preschool | Grades K-5 | Pacific Union Elementary
1464 Spear Ave.
Arcata, CA 95521
(707) 822-4721

About This School

Trillium Charter School is a public K-5 elementary school in Arcata, CA.

Our mission is to nurture community values within a diverse curriculum.  We offer small group and individualized core academic instruction balanced with strong school wide environmental science and art education.  

We offer before and after school care for working families and participate in the national school program, including free or reduced meals for eligible students.  Our school consists of two combination classrooms: one for K-2, and one for 3-5 with full-time credentialed teachers and part-time paraprofessionals in each class. We are proud to maintain a very low staff to student ratio for core academics.
Trillium Charter School is located in Arcata, CA and is one of 3 elementary schools in Pacific Union Elementary School District. It is a charter school that serves 40 students in grades K-5.

Charter schools are public schools, but differ from traditional public schools in that they are independent and are operated by educators, parents, community leaders, educational entrepreneurs, or others. Funding for charter schools is based on designated local or state educational organizations. Those organizations are responsible for monitoring and assessing the quality and effectiveness of education, but permit the schools to operate outside of the traditional public school education system. See Trillium Charter School's test results to learn more about school performance.

A school's Academic Performance Index (API) is a scale that ranges from 200 to 1000 and is calculated from the school's performance in the Standardized Testing and Reporting (STAR) Program. The state has set 800 as the API target for all schools to meet.

Trillium Charter School had an API growth score of 786 in 2012. California uses the Academic Performance Index (API) to measure annual school performance and year-to-year improvement. Trillium Charter School's 2012 base score was 750 and the school did meet its 2012 school-wide growth target.

In 2011, Trillium Charter School had 13 students for every full-time equivalent teacher. The California average is 24 students per full-time equivalent teacher.

Students (2011)


Students Per Teacher (2011)

Female/Male (2008)

32% 68%

District Spending (2010)

per student
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