THIS BOOK FURNISHES CURRENT INFORMATION ABOUT THE SCIENCE CURRICULUM IMPROVEMENT STUDY (SCIS) OF THE UNIVERSITY OF CALIFORNIA, BERKELEY. IT IS PRIMARILY DIRECTED AT ELEMENTARY SCHOOL TEACHERS, PROSPECTIVE TEACHERS, AND ADMINISTRATORS, BUT IT WOULD BE PERTINENT TO ANYONE INTERESTED IN NEW TRENDS IN ELEMENTARY SCHOOL INSTRUCTION. THE ACCOUNT DESCRIBES THE WORK OF THE PROJECT FROM ITS INCEPTION THROUGH THE SUMMER OF 1966. APPENDED IS A REPRINT BY JEAN PIAGET ON COGNITIVE DEVELOPMENT IN CHILDREN. A READING LIST, INCLUDING SECTIONS ON THE NATURE OF SCIENCE, LEARNING THEORY, AND CURRENT CURRICULUM STUDIES AND PROJECTS, IS INCLUDED. THIS DOCUMENT IS AVAILABLE FROM RAND MCNALLY AND COMPANY, P. O. BOX 7600, CHICAGO, ILLINOIS 60680. (DS)