A BOOKLET DESIGNED FOR ELEMENTARY SCHOOL STUDENTS TO BE USED INDEPENDENTLY FROM AND IN ADDITION TO THE REGULAR CLASSROOM CURRICULUM IN MATHEMATICS IS GIVEN. THE FIFTH- OR SIXTH-GRADE STUDENT IS PRESENTED WITH A DISCUSSION OF THE APPLICATIONS OF THE SLIDE RULE AND WITH A BACKGROUND REVIEW OF NECESSARY CONCEPTS. THE CONCEPTS OF THE SLIDE RULE ARE EXAMINED. NUMBER SCALES, EXPONENTS, LOGARITHMS, DECIMAL POINT ESTIMATION, AND PROCEDURES USED TO MULTIPLY AND DIVIDE ON THE SLIDE RULE ARE PRESENTED IN LOGICAL SEQUENCE. THE TEACHER SHOULD IDENTIFY POTENTIAL USERS, ORIENT THEM TO THE AREA TO BE EXPLORED, AND STIMULATE AND MAINTAIN THEIR INTEREST IN SUSTAINED INDEPENDENT EFFORT.