Over the course of the twentieth century New Yorkers developed the largest subway system in the world, traded horse drawn carriages for automobiles, built two international airports, fought in two world wars, and found themselves at the forefront of many artistic movements. This book uses primary source illustrations, full-color photographs, and engaging text to explore life in New York in the 1900s, with an emphasis on the many technological leaps made over the course of the century. Supports New York City's Grade 2 social studies standard for Unit 2: New York City Over Time 1.1a, 1.2a, 1.3a, 1.3b, 1.4b, 3.1a, 3.1d, 3.1e, 4.1c, 4.1d, 4.1e.