Rebecca Stefoff

Describes the history of bridges, examines how engineers plan a bridge, details the construction of different types of bridges, and presents noteworthy examples.

Explores and explains how the Panama Canal was built. The book explores why the canal was built and describes the design stages and technologies used during construction. The book also describes the challenges builders faced while building the canal.

Tunnels allow people to cut through tall mountains or even travel deep underwater. Discover the engineering behind tunnels.

Animals communicate through a myriad of ways including body language and pheromones. This thoughtful book surrounding ethology and how animals communicate through smell, taste, sight, sound, and feel reveals the secrets and science behind animals. Elephants will show affection with each other by entwining their trunks. Kangaroos and rabbits thump their hind legs to warn others of impending danger. Explanative text by award-winning author Rebecca Stefoff...

How do you know you are getting the best deal in town? Sharpen your consumer smarts with Smart Spending. Curriculum Connections: - Shows how math can be used in real-world situations - Provides multistep word problems with the four basic functions - Compares and contrasts differences between needs and wants - Meets the national standards for fourth grade personal finance education.

"Explores various perspectives on the Space Race. The reader's choices reveal the historical details"-- "You are living in a time of change and progress. World War II is over, but the Cold War between the United States and its former ally, the Soviet Union, is on. Each country begins pouring resources into a battle for the most advanced space exploration technology. You are about to become a part of this exciting competition. Will you: Help the United...

"Provides comprehensive information on how animals feel by citing examples of emotional understanding and providing examples of animal altruism"--Provided by publisher.

Text and photographs introduce some of the 3600 kinds of starfish.

A biography of Mao Zedong, founder of a communist state in China in 1949, hailed by some as a hero, by others, a tyrant.