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A young student with blonde hair concentrates on writing at her desk.
Five young women stand together, smiling and embracing in a gym.
Three graduates in red gowns and caps walk arm-in-arm, smiling.
A young artist focuses on painting a landscape on a canvas.
Two fencers in protective gear engage in a match, blades crossed.

The Mammoth Charter School logo features a crest and text on a black background.


Turning interests into impact.

A school like no other. A bold and innovative community where every student is encouraged to dream big and push boundaries.

Dream it.

Do it.

Become it.

The award-winning Mammoth Charter School serves more than 1,400 Pre-K through 12th grade students in Portland, OR.

We are a community that nurtures curiosity, inspires exploration, and empowers students to discover their path and thrive with purpose.

Nature-Integrated Education

Outdoor learning experiences spark curiosity, hands-on discovery, and environmental awareness.

Whole-Child, Continuum Learning

A seamless Pre-K–12 journey supporting academic, social, and emotional growth at every stage.

Personalized, Passion-Driven Pathways

Students explore interests through flexible, project-based learning that builds skills and purpose.

Small Community, Strong Relationships

Small classes foster meaningful connections so every student feels known, supported, and guided.

Future-Ready Skills & Real-World Learning

Students gain critical thinking and real-world skills through hands-on, experiential learning.

By the Numbers

Leading art, music and theater programs, championship athletics, innovative facilities, and endless opportunities beyond the classroom — these are the things that make Mammoth Charter School like no place else.

100%

Seniors accepted to two or four year colleges

36k

Square feet of STEM space

91%

Faculty hold advanced degrees

32

Student clubs, sports, and activities

99%

Average graduation rate

14:1

Student to teacher ratio

76%

Participation in extra-curricular activities

3

State parks within a one hour drive
Two young students examine a butterfly in a clear container on a desk.

Elementary School

Sparking curiosity through active, hands-on learning.

Serving Pre-K through 5th grade, our elementary school nurtures a vibrant community with strong academics, enriching arts and activities, and a whole-child focus on social-emotional growth.

Elementary Opportunities

Students in lab coats collaborate around beakers and scientific equipment in a classroom.

Middle School

Rigorous academic programs that encourage growth.

Serving grades 6–8, our middle school fosters an inclusive environment with strong academics and engaging programs that extend beyond the school day.

Middle School Opportunities

Two young men in blue shirts walk and talk on a green sports field.

High School

Equipping students for success after graduation.

Serving grades 9–12, our high school offers a rigorous academic experience, dynamic extracurricular opportunities, competitive athletics, and a supportive, student-centered community.

High School Opportunities

What's Happening

Mark your calendars! From athletic competitions and academic showcases to community events and live performances, there’s always something exciting happening. Follow us on social media so you don’t miss a thing!

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In the News

Stay up to date on exciting news, events and more with the ParentSquare app!

Back to School!

August 18, 2026

Back to School!

The Pioneer PostNewsletter updateBack to School at Pioneer: A Fresh Start!The halls are buzzing, classrooms are coming back to life, and a brand-new school year is officially underway at Pioneer Mi...

Student Investigators!

March 12, 2026

Student Investigators!

Our Upper Elementary students have been hard at work, diving deep into fascinating topics as part of their Independent Investigations.This hands-on project is a perfect example of Montessori's emph...

Hometown Heroes!

March 2, 2026

Hometown Heroes!

K-9 Jagger's Hometown Heroes Checkout K-9 Jagger's Hometown Heroes Grant Giveaway submission The top three K-9's will receive a check for their program: $5,000 for 1st place; $4,000 for 2nd place; ...

Ricebird News!

February 24, 2026

Ricebird News!

Share important updates Stay up to date with Ricebird News! Superintendent Callaghan of El Campo ISD discusses the most recent developments in the district, alerts you of upcoming events and studen...

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