One of four teaching guides published by the Houston Independent School District for teacher use in developing career education units in the classroom, this document provides a teaching unit for five career areas: environmental control, public service, health, hospitality/recreation, and personal services. In each area, the behavioral objectives, instructional procedures, suggested activities, performance goals, evaluation, and a lesson plan are detailed. An appendix at the end of each section provides job descriptions and information through newspaper articles, cartoons, and short stories. A list of addresses for further material is provided for each occupational cluster. (JC)