One of the cases in the SimScience web-site devoted to areas of science where computer simulations are at the forefront of discovery. Cracking Dams asks: What happens when a dam cracks? What's a dam? How do things crack? Can engineers model the cracking of a dam? - Crackling Noise What is the link between predicting earthquakes and crumpling a piece of paper? Will understanding one help engineers understand the other? The site is divided into 3 groups of grade levels. beginning: grades K-4 or general beginners; intermediate: grades 5-8; advanced: grades 9-12. Age appropriate questions, lesson plans, teacher's guides, java simulations, case histories, scenariios, quizes, glossaries, help and webquests are provided for each level. Case studies are supplemented with digital movies.