Open Window School received full accreditation from The Pacific Northwest Association of Independent Schools, www.pnais.org, in 2001 for Grades Pre-Kindergarten through 5th Grade. It will undergo the re-accreditation process for all current grades in 2010.

Open Window School is a member of the National Association of Independent Schools, www.nais.org, and Washington Federation of Independent Schools.

Open Window School is approved by the Washington State Board of Education.