Like many, Montessori advocates, Keith became familiar with Montessori through the schooling of his own child. Moved by the impact of the Montessori approach on learning and human development, he began to undertake research on Montessori and saw the need for a national organization solely devoted to public Montessori schools. Keith is a nationally known historian of literacy and American schooling who has written extensively about the development of the Montessori movement in the United States.

Previously, Keith served on the faculties of the College of William and Mary, Ohio University, Wellesley College, and Lesley University, and he worked ten years as a high school history teacher in Atlanta. He received a B.A. in History from the University of Florida and an Ed.D. in History of Education from the Harvard Graduate School of Education.


Publications