Three Tree Montessori School
220 Sw 160th St, Burien, WA, 98166
Managed by the school
This school claimed its listing and manages its own information.
Last updated July 2026
- Program levels
- Primary, typically ages 3 to 6; Lower Elementary, typically ages 6 to 9; Upper Elementary, typically ages 9 to 12; Toddler, typically 18 months to 3
- School-claimed update (via Atlas dashboard), provided by the school, Jul 2026
- Governance
- Independent
- NCES Private School Universe Survey, 2021-22 (2021-22), from public records, Jul 2026
- Tuition model
- Private tuition
- Enrollment
- 151 to 300 students
- School-claimed update (via Atlas dashboard), provided by the school, Jul 2026
- Languages of instruction
- English
- Religious affiliation
- None (nonsectarian)
- NCES Private School Universe Survey, 2021-22 (2021-22), from public records, Jul 2026
- Accessibility
- Accessible
Affiliations and accreditations
- AMI affiliation · AMI membership self-reported to NCES PSS 2021-22; recognition status unverified · self-reported, unverified
- AMI recognized · verified Jul 2026