THIS GUIDE FOR THE SCIENCE FAIR PARTICIPANTS BEGINS WITH A CHAPTER ON THE NATURE OF SCIENCE, AND THE SCIENCE FAIR, AND CONTINUES THROUGH THE FIVE CHAPTERS OF PART ONE, PLANNING AND EXECUTING YOUR PROJECT, TO EXPLAIN THE DETAILS INVOLVED IN SELECTING, DEVELOPING, AND EXHIBITING A PROJECT. PART II OF THE VOLUME CONSIDERS THE STRUCTURE OF SCIENCE FAIRS, AND EXPLAINS PROJECTS, RULES, JUDGING, AND AWARDS ON EACH OF FOUR LEVELS--SEVENTH GRADE, JUNIOR HIGH, SENIOR HIGH, AND REGIONAL. PART III, PROJECT REPORTS, IS A COLLECTION OF 22 REPORTS WRITTEN BY OUTSTANDING SCIENCE FAIR PARTICIPANTS WHO HAVE BEEN AWARDED NATIONAL HONORS. THIS DOCUMENT IS AVAILABLE FOR $3.95 FROM THE ARCO PUBLISHING COMPANY, 219 PARK AVENUE SOUTH, NEW YORK, NEW YORK 10003. (DH)