The guide, designed for sixth, seventh, or eighth grade teachers and students, presents six science instructional units for career exploration related to the occupational clusters manufacturing (2), communication, transportation, health and agribusiness. The units deal specifically with: the scientific method for research, using the scientific method for research, systems analysis, air transportation, duties of a medical assistant, and energy from natural resources. Each unit is based on behavioral objectives which are stated as terminal objectives, dealing with the subject matter to be covered, and as specific objectives, dealing with the student performance necessary to reach the terminal objective. The other components of each unit are: list of suggested activities for instructor and student, reference list, information sheets outlining the content of the unit, assignment sheets providing specific written activities, job sheets providing creative projects, answers to assignment sheets a unit test, and answers to the test. Some units also contain transparency masters. Instructions for using the guide and forms and guidelines for field trips, interviews, and resource people are included. (MS)