Arroyo Grande Montessori School was founded in January 1981 to provide the best possible preprimary education experience for Central Coast children between two and six years old. After 10 years in a rented facility the school moved to its present location in September 1990. The school has been independently owned and operated by Joyce and Mike Miller since its beginning.

Joyce Miller, the school's director of education, earned a bachelor of science degree in early childhood education from California State University Northridge. She received her Montessori certification from the International Assn. of Progressive Montessorians in La Jolla, Calif. in July 1980. She has also completed other extensive training, including with St. Nicholas Montessori Training Center in London, the Montessori World Educational Institute, Mortenson Math and the Lindamood-Bell reading program. She is a graduate of the Oruff-Schulwerk school of music training. Mike Miller, school administrator, was awarded bachelor of arts degrees in English and journalism from California State University Northridge. He received his Montessori training from the Montessori World Educational Institute in San Luis Obispo, Calif. All classroom teachers are Montessori trained, and all staff have a thorough knowledge of the Montessori method and the developmental needs of children.