The Montessori School of Duluth started as the Montessori Elementary School -- the first private, independent, nondenominational elementary school in the history of Duluth. It was founded in 1981 by Anne and Al Nephew to serve fifteen students graduating from a Montessori Children's House.

The elementary classroom, originally located on Park Point, was taught by Anne who has her teaching license from St. Scholastica
College, and her MA from the University of Minnesota. Anne earned her AMI elementary diploma in Dublin, Ireland, where she lived for a year with her young family, an experience that her grown children still remember well.

Her husband, Dr. Al Nephew, served as the school's Business Manager. He was also a perennially popular classroom figure at the College of St. Scholastica, as a philosophy professor there from 1970 until his retirement in 2013. He is currently a Professor Emeritus and one of the college's 100 Century of Saints honorees.

The school was incorporated as the Montessori School of Duluth, Inc., a not-for-profit tax exempt corporation, in 1982. In 1983 it added the preschool Montessori program and moved to the Cathedral (now Marshall) High School campus.

In 1991, after renting at Cathedral for eight years, Montessori School of Duluth purchased property in Hunter's Park, a beautiful, quiet residential neighborhood in eastern Duluth convenient to the colleges and seven minutes from downtown. In 2009 and 2011, enlargement and remodeling projects were completed in the Early and Late Care area and the Elementary areas, creating an exceptional planned environment for the school's students. The remodeled building provides generous space for the school's growing enrollment.

2014 was a year of internal change at Montessori School of Duluth. After more than 30 years of service, founders Anne and Al Nephew retired from their positions at the school in the spring and welcomed Joel and Lindsey Young to take up those reins of leadership. The school appreciates Anne and Al's dedication and lifetime of exceptional service to the children of Duluth. All their hard work has made MSD the vibrant school it is today.