Patricia Armentrout

In this series, you'll explore six simple machines. Each book describes a different one and explains how it helps make our work easier. Experiments and activities give you the chance to work with each simple machine. You'll be surprised at how many you've been using all along! - Back cover.

Explains the formation of the United States Constitution, the people involved in getting it ratified, and how it changed government.

A brief biography of nineteenth-century French scientist Louis Pasteur, discussing his study of germ microbes and his discovery of the process now known as pasteurization in which germs are killed with heat.

Takes a look at the writing of the Bill of Rights, who was involved in the undertaking, and how they changed your rights today.