Smithsonian in the Classroom presents Building Up, Breaking Down. Teachers can download this comprehensive teaching package in which students investigate how buildings weather. See what happens to a building once it has been erected. Students will look at similarities and differences among urban and rural settings. In an examination of the geology of buildings, they will also look at such things as rock fracture, chemical weathering, and pollution. In addition to detailed lesson plans, this amazing teaching resource comes complete with background information, vibrant visuals, and student handouts.