When a view of Earth's surface is shown on a flat surface, the image is called a map. A map may show the entire surface of Earth, or it may show only certain parts of Earth's surface. Find out more in Mapping, one of the titles in the Social Studies Essential Skills series.

Misinformation and disinformation both describe misleading or false information--one is spread unintentionally and the other is shared on purpose. Censorship involves suppressing certain information. All three significantly impact how people interpret issues and events. This important title examines the different ways of, and reasons for, controlling information, and how to build information literacy. Free downloadable Teacher's Notes.

This timely title discusses the creation of the atom bomb and the post-World War II nuclear arms race that shaped the consciousness of generations. Primary and secondary source materials such as contemporary photos, speeches, letters, and newspaper accounts are examined, offering readers insight into a world reeling from years of conflict, and the competing political and social ideologies of the former Soviet Union and the United States and its allies....

How can African wild dogs hunt animals ten times their size? What does the howl of a coyote mean? Why do some solitary hunters live in packs? Discover the answers in this engaging book and learn about the many ways living in a pack helps animals survive. Free downloadable Teacher's Guide available.

This exciting title introduces readers to the concept of a wave and the patterns and properties common to both light and sound waves. Clear text and detailed diagrams combine to demonstrate the cause-and-effect relationships involved in the properties of amplitude, wavelength, and frequency. A link to interactive activities online plus an activity in the book allows readers to explore key concepts close up by creating their own wave models.

In this fascinating title, readers explore how light and sound waves transfer information. From telescopes that extend our sense of sight to satellites that help us communicate across large distances, patterns of waves transfer information in many ways.

Why do gorilla troops move to a new area each day? Why do bonobos sleep in large groups? How do animals in a troop help raise young? Discover the answers in this amazing book and learn about the many ways living in a troop helps animals survive. Free downloadable Teacher's Guide.

Did you know that BMX means bicycle motocross? Some BMX bikes are made to do jumps and tricks. Others are made for racing. Learn more about this extreme sport in “BMX”, an Extreme Sports book.

A virus is a type of germ so small that it can only be seen with a microscope. Viruses were discovered in the late 1880s. Discover more in What Is a Virus?, part of the Understanding Viruses series.

Viruses are contagious. They can be passed from person to person. They can also be passed to a person by an animal. Discover more in How Does a Virus Spread?, part of the Understanding Viruses series.