What invention has had the greatest impact on people’s lives?/emTwenty-five projects supported with easy-to-read text, timelines, maps, images, sidebars, vocab, and web resources show students who led the Industrial Revolution and how their inventions changed the world. Make a water-powered wheel Work on an assembly line Create your own invention And more!Copyright 2011. Middle school. Reproducible. 8 x 10 inches. Softcover, 120 pages.