Make an impact in your classroom with this interdisciplinary guide to cratering. Craters! Includes 20 ready to use, hand-on activities that use cratering to teach key concepts in physics, astronomy, biology, and Earth sciences. Special features include a custom CD-ROM packed with supplemental images for classroom activities, a specially written summary of research on Shoemaker Levy 9's encounter with Jupiter, and a detailed background section for teachers. A joint project of NSTA, NASA, and The Planetary Society.