Three Tree Montessori School provides Montessori learning environments in which children are encouraged to explore, learn and interact in a diverse community that fosters independence, critical thinking and learning for life.
Quick Stats (2025)
- School Type: Montessori School
- Grades: Prekindergarten-6
- Enrollment: 176 students
- Yearly Tuition: $16,055
- Average class size: 22 students
- Application Deadline: None / Rolling
- Source: Verified school update
School Overview
School Type
School Membership(s)School Assoc.
Religious Affiliation
Grades Offered
Grades Prekindergarten-6
Year Founded
2003
Summer School Offered
Yes
Summer Program Details
School Calendar
First Day of School
Mon. Sep 1, 2025
Student Body
Total Students
176 students
Student Body Type
Co-ed
% Students of Color
36%
State avg.: 30%
Students by Grade

Academics and Faculty
Total Classroom Teachers
7 teachers
Student : Teacher Ratio
25:1
National avg.: 13:1
% Faculty w/Advanced Degree
44%
Average Class Size
22 students
Classroom Dress Code
Casual
Tuition and Acceptance Rate
Admission Deadline
None / Rolling
Yearly Tuition Cost
$16,055
Tuition Notes
Please refer to website for current tuition & fee schedule.
Summer Program Cost Notes
Please refer to website for current summer program costs.
% on Financial Aid
10%
Admissions Director
Sawyer Pouliot
Application URL
Extracurriculars
Total ExtracurricularsTotal Extra-curric.
1 extracurricular
ExtracurricularsExtra-curric.
Recreational Athletic Programs:
Teeny Tumblers
Teeny Tumblers
School Notes
- Three Tree Montessori School's programs include:
- Toddler communities for ages 15 months - 3 years
- Primary communities for ages 2.5 - 6 years
- Lower Elementary community for ages 6 -9 years
- Upper Elementary community 9 - 12 years
- AM/PM Care for families needing extra hours
- Summer Program (for currently-enrolled students in the academic year & alumni)
- Family members are involved in the community through parent workshops, community social events, special events related to classroom and all-school celebrations, and participation in committee and task force work.
Source: Verified school update
Frequently Asked Questions
How much does Three Tree Montessori School cost?
Three Tree Montessori School's tuition is approximately $16,055 for private students.
Does Three Tree Montessori School offer a summer program?
Yes, Three Tree Montessori School offers a summer program. Visit their summer school page for more information.
When is the application deadline for Three Tree Montessori School?
The application deadline for Three Tree Montessori School is rolling (applications are reviewed as they are received year-round).
School Reviews
5 5/17/2016
Switched from a more "well known" private school in Seattle. Couldn't be happier. Kids are taught to love learning and be self reliant in an environment with much better diversity and a much higher level of respect for the children as people. Some of the most committed teachers I''ve ever met. Love this school
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