Mt. Si Arbor Montessori School

Mt. Si Arbor Montessori School

Mary O’Brien established Arbor Montessori Schools on the Sammamish Plateau in 1993. It serves 150 children from infancy through 6th grade. In 2008, the principle of Issaquah Montessori school approached the owner of Arbor hoping that Arbor would keep her dream alive since she was relocating to Eastern Washington. The O’Briens did take on Issaquah Montessori in 2009 and it now serves 90 children from ages 15 months to six years. For several years Arbor Montessori Schools has been looking to join the Snoqualmie Valley Community. In June of 2018 when the owner and operator of Mountain Valley Montessori School found her family relocating to Tacoma, Arbor once more was faced with the opportunity to bring its institutional experience and passion for Montessori to keep another founder’s dream alive. The principles of Arbor have taken over the operations of Mountain Valley Montessori at 248 Main St, in beautiful downtown North Bend. The Montessori school is now operating as Mt. Si Arbor and serves children from 15 months to 6 years of age.


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  • 248 Main Ave South
    North Bend, Washington 98045
    United States
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