"What exactly is the difference between Eastern Standard Time and Pacific Standard Time? And why do they-and the 22 other global time zones-exist at all? In this fun, informative set, readers learn the answers to these questions, starting with the history of time zones that began with the American railroad lines. With content that supports social studies curricula, the main text is written especially for lower elementary readers. Colorful maps throughout...

"There is no more accurate way to communicate your location than using latitude and longitude-and it even transcends a language barrier! These coordinates can help rescuers save someone lost in the wilderness or geocachers discover their treasure. In this informative volume, readers learn about the development, use, and accuracy of the grid mapping system of latitude and longitude. The main content supports mapping topics in social studies classes,...

"Whether you're looking at a paper map or a map online, it's important to understand how to read it. From weather maps to road maps, these tools help us better understand the world around us, and especially help us find where we're going! This volume includes basic map concepts, such as using map keys, scale, and latitude and longitude, all of which support lower elementary social studies curricula. Examples and full-color maps introduce readers to...