The lower school, pre-school through 8th grade, is located on the grounds of St. John's Episcopal Church, Norwood Parish, in Chevy Chase.

[4] In 2017-18, the racial makeup of Oneness-Family School's K–12 students was 74.4% white, 10.2% Hispanic, 10.2% African American, and 5.1% Asian/Pacific Islander.

[6] Keeping with Montessori principles, students learn in mixed-age groups instead of single-grade classrooms.

[9] Students annually celebrate the founding of the United Nations with diplomats stationed in the local area.

[10] In addition to traditional academic subjects, Oneness-Family School teaches nature experiences, meditation, yoga, and tai chi to help students work on self-discipline and relaxation[6] as part of its Self-Discovery curriculum.