Three Period Lesson
When introducing vocabulary to the child, Montessori teachers use specific language in a specific order to help introduce, practice and check for mastery. This is called the Three Period Lesson. The lesson can be used throughout the Montessori Environment. The lesson is used to increase and enrich the child’s vocabulary. Edouard Seguin, a French physician who worked with special needs children during the late 19th century, was an influence on Maria Montessori in many ways.