A BOOKLET FOR ELEMENTARY SCHOOL STUDENTS TO BE USED INDEPENDENTLY FROM AND IN ADDITION TO THE REGULAR CLASSROOM CURRICULUM IN MATHEMATICS IS PRESENTED. THIRD- AND FOURTH-GRADE STUDENTS CAN GAIN ADDITIONAL INSIGHTS INTO THE CONCEPTS OF SCALES, UNITS OF MEASURE, AGE, DATES, TIME, HEIGHT, TEMPERATURE, AND MONEY. EMPHASIS IS PUT ON THE PHYSICAL AND PRACTICAL APPLICATION OF RECENTLY LEARNED ARITHMETIC OPERATIONS. THE TEACHER SHOULD IDENTIFY POTENTIAL STUDENTS, ORIENT THEM TO THE AREA TO BE EXPLORED, AND STIMULATE AND MAINTAIN THEIR INTEREST IN SUSTAINED INDEPENDENT EFFORT.