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Lorna McGrath, MEd, is Director of IMC School Accreditation, Program Director of the Montessori Family Alliance, and Senior Consultant of The Montessori Foundation. Lorna has 41 years of experience in the field of education, teaching children from 18 months through 6 years old and from 12 through 18 years old in both public schools and independent Montessori schools. Lorna is a Montessori teacher educator, conference presenter, and school consultant. She can be reached at
Editor’s Note: The Three-Period Lesson is a fundamental technique used by Montessori educators to introduce a new lesson to children and lead them along a path to understanding and mastery. Most of us first think of the Three-Period Lesson as it is used to teach vocabulary, as illustrated in this brief article by Lillian DeVault […]