Undated, 1963-1993, correspondence, documents, and articles regarding Montessori theory and education, including a page from "The System of Numeration As It Relates to Early Learning Experiences," a booklet titled "A Montessori Manual for Parents of Preschoolers," and documents titled "Education as a Help for Life," "Discovering Montessori: An Exchange of Correspondence Between Dr. J McV Hunt and Gilbert Donahue," "Montessori Melee: Educators Quarrel Over the Best Way to Teach Three-Year-Olds," "Mental Development through Movement and Sensory Stimulation," "I bisogni del bambino e le nostre risposte: conversazioni con Grazia Honegger Fresco," "The Ideal Montessori Environment for Children–Ages Two and One-Half Through Six," and "Odyssey to Holism."