Sally M Walker

Eight-year-old Letty attempts to save her pet goose from marauding British soldiers in New Jersey during the Revolutionary War.

First published for an adult readership, The Weather Makers got kudos for its solid science and powerful message. Now this accessible edition speaks directly to young adults, offering a clear look at the history of climate change, how matters will unfold over the next century, and what we can do to prevent a cataclysmic future. Newly featured are twenty-five practical tips for living a greener lifestyle--at home, in school, in the community, and ultimately,...

What do staircases, dump truck beds, and ramps have in common? All of them are inclined planes! Inclined planes are simple machines. They help us to do jobs more easily. But don't take our word for it. Put inclined planes to the test with the fun experiments you'll find in this book. As part of the Searchlight Books™ collection, this series sheds light on a key science question-How Do Simple Machines Work? Hands-on experiments, interesting photos,...

Audisee® eBooks with Audio combine professional narration and text highlighting to engage reluctant readers! What do flagpoles and some window blinds have in common? They use pulleys to perform work! Pulleys are simple machines. They help us to do jobs more easily. But don't take our word for it. Put pulleys to the test with the fun experiments you'll find in this book. As part of the Searchlight Books™ collection, this series sheds light on a...

What do bicycles, doorknobs, and screwdrivers have in common? All of them use wheels and axles to perform work! Wheels and axles are simple machines. They help us to do jobs more easily. But don't take our word for it. Put wheels and axles to the test with the fun experiments you'll find in this book. As part of the Searchlight Books™ collection, this series sheds light on a key science question―How Do Simple Machines Work? Hands-on experiments,...

What is an inclined plane? How do you use a wedge? Using easy-to-understand examples and fun-to-do experiments, discover how these two simple machines work and make the work that you do easier.

We've all seen screws, but how do they work? Why is it easier to screw something into something than to simply push it in? With basic hands-on experiments and clear descriptions, this simple machine is explained.

Of the six simple machines, the wheel and axle is probably the most recognized. But how does it help you work? Simple and fun experiments illustrate the basic concepts explained in the text to show you just how easy work can be.

The creators of 1968 examine the important historical events and people of 1789 and their significance on modern perspectives about human equality, in a nonfiction anthology that includes coverage of the U.S. Bill of Rights, the French Revolution and thedigits of pi. Simultaneous eBook.