Formerly named the DuPage Creekside Montessori Educational Center, the DuPage Montessori School is a private, non-profit school founded in 1987 by Robert and Sharon Breen. DuPage Montessori School is affiliated with the American Montessori Society and registered with the Illinois State Board of Education. The school has two toddler rooms, five preschool and kindergarten rooms, two classes for the first and third grades and one class for the fourth grade.