The unified science approach to instruction is one in which the concepts and processes of science are presented to emphasize the fundamental unity of scientific thought rather than the distinctions among the various scientific disciplines. The general thrust of this program is to provide students with motivating, meaningful units that will emphasize science as a quest for the solution of real societal problems through research and investigation. Chapters include "Developing a Unified Science Approach"; "Planning and Preparation"; "Evaluation of Student Performance" and six issues to examine including: (1) "Environmental Decisions"; (2) "Science and Crime"; (3) "Disasters"; (4) "Consumerism"; (5) "Food and Nutrition"; and (6) "Science, Technology and Auto Safety." Each issue contains backround; course outline, including key questions and performance objectives; and activities. Appendices include "Additional Issues"; "Activity References"; "General References"; "Sample Evaluation Items"; "Reading and Writing in Science"; "Goals of the Board of Regents for Elementary and Secondary Education in New York State"; "Excerpts from a National Science Teachers Association Position Statement"; "Guidelines for the Use of Vertebrate Animals (Humane Treatment)"; and "Students with Handicapping Conditions." (CW)