Layers of Learning Unit 4-8 begins with World War I including the assassination of Archduke Ferdinand, The Battle of Mons, trench warfare, technology advances, airplanes, Verdun, the Somme, the eastern front, American involvement, and the peace treaty. Then learn about the plains states including Kansas, South Dakota, North Dakota, Minnesota, Nebraska, Iowa, and Missouri. Next in science learn about earthquakes including seismometers, seismic waves, P-waves, S-waves, strike-slip faults, elastic rebound theory, Richter and moment magnitude scales, and focus and epicenters. Last, study Expressionist artists including Kadinsky, Kirchner, Karl Schmidt-Rottluff, Edvard Munch, Franz Marc, the Dada movement and others. In each unit you'll find a recommended library list, important background information about each topic, and lots of activities to choose from for kids of all ages. Sidebars include a bunch more ideas including Additional Layers, Fabulous Facts, On The Web, Writer's Workshop, Famous Folks, and Teaching Tips. Printable maps and worksheets are included at the end of each unit and may be printed as often as needed for your family or class. Learn more at Layers-of-Learning.com.