Accredited and Experienced Montessori Teachers Educational Field Trips: local and nationwide, low student teacher ratio, karate, dance and foreign language, annual spring recital summer olympics, hot lunch available, computer and piano lessons available. One of the many important discoveries made by Dr. Montessori was that children pass through a series of "sensitive" periods in the course of mental and psychic development. These are periods of intense fascination of learning a particular skill, such as going up and down the steps, putting things in order, reading, counting or learning a language (as all children learn before they are two). It is easier for the child to learn a particular skill during the corresponding sensitive period than at any other time in his or her life.