Woodinville Montessori School (WMS) operates two Eastside campuses: the Bothell campus on North Creek Parkway is the larger of the two, carrying programs from Toddler (18 months) through 12th grade, while a separate Woodinville campus at 13965 NE 166th Street historically houses early childhood and elementary. WMS has been jointly accredited by the American Montessori Society and the Northwest Association of Independent Schools since spring 2006, making it the only AMS-and-NWAIS accredited Montessori through 12th grade in the Pacific Northwest — and the only accredited Montessori High School Program in Washington.
That structural fact shapes the peer set. Among Eastside Montessori options — Eastside Montessori, Park Avenue Montessori, and Eton School (which uses Montessori-influenced methods through elementary) — none carries the program past middle school. Families weighing the WMS high school program are typically choosing between Montessori continuity and a transition to a conventional independent or public high school for the Upper Years.
The Bothell campus delivers the school's full arc — Toddler, Early Childhood, Lower Elementary, Upper Elementary, Middle School, and high school with internal college counseling — alongside interscholastic athletics, electives, and clubs more typical of conventional independent schools. Combined enrollment across both campuses runs in the low hundreds with student-teacher ratios near 12-16:1. Head of School Sunita Pailoor has framed the WMS approach around academic preparation paired with self-advocacy and collaboration across learning styles.
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