Becomes affiliated with the American Montessori Society (AMS)
Accredited by the Independent Schools Association of the Central States (ISACS).
Addition to the building to increase preschool, K/1 classrooms and administrative offices.
School changes its name to Chesterfield Day School.
Addition to the building to increase 2nd/3rd grade and 4th/5th/6th grade classrooms.
Second ISACS evaluation/accreditation.