Vicente Requeno (1743-1811)

Explains that people take measurements to find out how tall, how long, how far, how fast, how heavy, how much, and what size.

Illustrations and text present the history, geography, people, politics and government, economy, and social life and customs of Arizona, the Grand Canyon State.

These passenger trains can travel more than 180 miles per hour! These modern marvels of technology will fascinate any reader.

Mars is perhaps the most thrilling planet these days. With rovers exploring its surface and manned missions in the works, people are wondering if Mars is our next home! In this highinterest book, readers will learn more about Earth's neighbor, including what its climate and surface are like, why it's called the Red Planet, and about the recent discovery of water on its surface. They'll learn all this while solving "Your Mission" math problems that complement and support the text. This motivating volume is an engaging way to explore key aspects of science and math curricula.