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Descriptive (nonfiction) 161 words, Level I (Grade 1), Lexile 700L.Bridges can move in many ways to allow for the safe passage of ships. They can move up and down, tilt sideways, and even fold up like an accordion! Moving Bridges introduces students to the ingenious designs behind these bridges that can be found throughout the world. This book can also be used to teach students how to compare and contrast as well as to ask and answer questions to better understand the text.