We encourage parents to confirm our authorizations and accreditations—and to look for proper credentials at any school they may be considering.

All Riverstone staff members participate in our accreditation and authorization evaluations. Many staff members serve as accrediting team members for other schools seeking accreditations and authorizations.


Riverstone International School is Idaho’s first International Baccalaureate World School. We received authorization to offer the Diploma Programme in grades 11–12 in 2004.

Additionally, Riverstone is the only school in Boise—and one of fewer than 40 nationwide—that is authorized by the International Baccalaureate Organization to offer the complete continuum of International Baccalaureate Programmes:

  • Diploma Programme (DP for grades 11–12)
  • Middle Years Programme (MYP for grades 6–10)
  • Primary Years Programme (PYP for preschool–grade 5)

Authorized IB World Schools share a commitment to the International Baccalaureate philosophy, but every school develops its own curriculum.


Riverstone International School is accredited by the following organizations:


Riverstone International School is a member of the following organizations:

  • The Association of Boarding Schools (TABS)

Jay Mathews of The Washington Post Challenge Index 2022

Top 1% of High Schools in America

Niche.com 2022

#1  Best ID Private K-12 School

#1 Best ID Private High School

#1 ID Best Boarding School

#1 Best ID High School for College Preparation

#1 Best ID High School for STEM

#49 Best U.S. Boarding School

Top 4% Best U.S. Private K-12 School

Top 5%  Best U.S. Private High School

A+ Overall School

A+ Academics

A+ College Preparedness