The three lectures presented in the following pages were delivered before an audience of parents and others interested in the University Elementary School, in the month of April of the year 1899. Mr. Dewey revised them in part from a stenographic report, and unimportant changes and the slight adaptations necessary for the press have been made in his absence. The lectures retain therefore the unstudied character as well as the power of the spoken word. As they imply more or less familiarity with the work of the Elementary School, Mr. Dewey’s supplementary statement of this has been added.