Rebecca Stefoff

Bridges have helped people cross, large bodies of water for millennia. Readers discover the engineering behind bridges.

This title explores and explains how the Panama Canal was built. The canal's construction is described in terms of the engineering process. 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.

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...

Ethology is the scientific study of animal behavior. It was widely thought that animal play, mostly in mammals, was part of Darwinian natural selection and somehow fit into survival of the fittest. However, animal researchers believe that animals play out of pure joy, rather than aiding in their survival. This jovial book about animal play, tells the secrets of, and the science behind, clever baboons that know which cars to break into for snacks,...

Birds that are smarter than a fifth grader--smart enough to do math, that is. Chimps that use tools. These are just two examples of the amazing skills of the animals all around us. In this jovial book, award-winning author Rebecca Stefoff tells us not just that animals are intelligent, but explains how researchers have discovered how smart they are. Readers will learn the languages of chimps and the mental maps of birds as well as the disputes that...

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.

This book on the four elements and the periodic table shows the scientific method at work, proves, and disproves the subjects at hand. It explores a branch of modern science or a major scientific milestone, comparing and contrasting it with an older idea that has been proved wrong or fails to meet the strict and studied standards of science. A robust index, glossary, science content, and bibliography accompanies the descriptive and concise text while...

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

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. The United States government is afraid the Soviet Union will use space to develop weapons with its space technology. We want to get there first! Will you help your country by developing the first space rocket, or perhaps moving to Cape Canaveral to train as an astronaut?

Through centuries of storytelling, giants have evolved into monstrous fairy tale creatures with unique powers. This book explores many stories about giants and discusses their place in history as well as in today's society.