This collection of 20 articles from "The Science Teacher" and "Science and Children" is provided to assist teachers, students, and parents in preparing for science fairs. Four major questions about science fairs are addressed in the articles. They are: (1) Who should participate in a science fair? (2) How should a fair be organized? (3) What makes a science project successful? and (4) How should projects be judged? A position statement by the National Science Teachers Association (NSTA) on science fairs is included. (JN)