How a City Works (Let's-Read-and-Find-Out Science 2)
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David J. (D.J.) Ward entered college to study radio and television but quickly found his true passion was science. He finished with a master's degree in geology. After working as a geologist for seven years, David became a high school science teacher and has been teaching ever since. The classes he teaches are physics, astronomy, geology, and earth & environmental science. David lives in Colorado with his wife and two boys. He like to play basketball, volleyball, and Ultimate, hike in the mountains, and play bass guitar.
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