Marthe, Louise, and Jeanne Maret, left their home in the village of Marignan (Sciez) in France close by Geneva, Switzerland, to teach.

Louise taught in Russia, Jeanne in the Philippines, and Marthe (who became blind at age 18), in Washington, D.C.[1] By 1911, Louise and Jeanne had joined Marthe in Washington, where they were inspired to bring an international flavor to education.

In 1923, the sisters moved the school to 2118 Kalorama Road with an enrollment of 62 culturally diverse students.

In 1952, growing enrollment compelled the School's Board of Trustees to secure a larger campus at 3000 Cathedral Avenue, NW.

To accommodate a growing enrollment, the school added additional facilities for athletics, arts, and academics.