Focusing on occupational clusters of transportation and communications, this unit entitled "Telephone Workers" is one of four grade one units which are part of a total set of twenty-seven career development curriculum units for grades K-6. This unit is organized into four sections. Section 1 identifies one career development-centered curriculum (CDCC) element (life role-understanding), five career development themes (e.g., the student will understand the relationship of education to life-roles), six unit goals (e.g., the student will understand the relationship of science studies to life roles), and eight performance objectives (e.g., the student will verbalize one property of sound). Also included in Section I are evaluation procedures for a pre- and post-assessment, three student evaluation sheets, and evaluation tabulation forms for the unit. Section II describes teaching strategies for eight unit subtopics (capsules) and includes suggested resources for teaching each one. Among the capsule titles are sound and the telephone, operator, and telephone etiquette. Section III contains four teacher reference sheets, and section IV contains nine student activity sheets. (JH)