THIS BULLETIN PREPARED FOR THE ASSOCIATION FOR CHILDHOOD EDUCATION INTERNATIONAL (ACEI) PROVIDES GUIDELINES FOR TEACHERS, ADMINISTRATORS, CONSULTANTS, SUPERVISORS, AND OTHERS WHO WORK WITH CHILDREN TO PROMOTE AND DEVELOP EFFECTIVE LEARNING EXPERIENCES FOR CHILDREN IN SCIENCE. THE PUBLICATION IS BASED ON THE PREMISE THAT EXPERIENCES THE CHILD HAS IN SCIENCE SHOULD DEVELOP BEHAVIORAL CHANGES. HE SHOULD ACQUIRE NEW IDEAS, BROADER INTERESTS, SKILLS HE DID NOT FORMERLY POSSESS, AND MORE EFFECTIVE WAYS OF THINKING. SOME TOPICS DISCUSSED ARE (1) THE NATURE OF EIGHT-TO-TWELVE YEAR OLDS, (2) REASONS FOR TEACHING SCIENCE IN THE ELEMENTARY SCHOOL, (3) GUIDELINES FOR SELECTING CONTENT, (4) WAYS OF HELPING CHILDREN LEARN SCIENCE, (5) SELECTING MATERIALS FOR SCIENCE LEARNING, (6) TEACHING EFFECTIVENESS, AND (7) ASSESSMENT OF LEARNING. A BIBLIOGRAPHY AND ANNOTATED LISTING OF OTHER ACEI PUBLICATIONS ARE INCLUDED. THIS DOCUMENT IS AVAILABLE FROM THE ASSOCIATION FOR CHILDHOOD EDUCATION INTERNATIONAL, 3615 WISCONSIN AVENUE, N.W., WASHINGTON, D.C. 20016. (DS)