MBS high school student mentoring a younger Wildcat outdoors

About Us

Where Learning Shapes Who Students Become

At Marian Baker School, students grow in a close-knit American community where curiosity is nurtured, character is developed, and strong academics open doors to the world.

A Place Where Students Grow with Purpose

Founded in 1984, we are a private American school in Costa Rica serving students from early childhood through high school. Our small school environment allows us to know each student personally and guide their growth with care, intention, and high expectations.

Every child arrives with curiosity, talents, and potential waiting to be discovered. Here, students feel supported to explore, challenge themselves, and grow with confidence.

MBS student reading in the school library

An Education That Prepares Students for the Future

At Marian Baker School, strong academics are at the heart of everything we do. Beyond academics, students develop essential skills — critical thinking, communication, and independence — that help them succeed in a global environment.

Our bilingual program in English and Spanish, combined with a rigorous academic foundation and the IB Diploma Program in high school, prepares students for universities around the world.

Accreditations & Memberships

Marian Baker School is internationally recognized and locally accredited — preparing students with credentials that travel.

IB Diploma Programme

Authorized World School for the International Baccalaureate Diploma Programme.

AASCA

Member of the Association of American Schools of Central America.

MEP

Recognized by Costa Rica’s Ministerio de Educación Pública.

Cognia

U.S.-accredited by Cognia, a leading school accrediting body recognized worldwide.

NASSP

Member of the National Association of Student Councils, a program of NASSP.

MBS faculty and staff group portrait on the campus lawn

A Community Where Students Are Known and Valued

With small class sizes and close relationships between teachers, students, and families, we create an environment where every student feels seen, supported, and encouraged.

Learning extends beyond the classroom through arts, athletics, and leadership opportunities that help students discover their interests and build confidence.

This balance of academic rigor and personal connection creates a school experience where students truly thrive.

A Tradition of Excellence, A Future of Possibilities

For over 42 years, Marian Baker School has guided generations of students toward academic success and personal growth.

Today, we continue to evolve while staying true to our mission — to nurture students who are prepared for university, for life, and for the world they will help shape.