The world came to a halt in 2020 due to the COVID-19 virus. This timely book looks at how governments jumped into action, adapting their strategies as the pandemic evolved and changed. It also explores historical pandemic responses, the problems and challenges related to carrying out pandemic strategies, and how we can learn from the COVID-19 pandemic to prepare for the future. Free downloadable Teacher's Notes.

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.

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.

A pandemic develops when a disease spreads across a country, continent, or around the world. Discover more in What Is a Pandemic?, 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.

SARS stands for Severe Acute Respiratory Syndrome. It is an infectious disease that attacks a person's respiratory system. Find out more in SARS, one of the titles in the International Outbreaks series.

Measles has been around for hundreds of years. Settlers likely brought this disease to the Americas in the 1600s. Find out more in Measles, one of the titles in the International Outbreaks series.

This fun and informative survival guide introduces readers to the challenging environment of a deserted island. Useful tips tell you how to stay calm, what you can - and shouldn't - eat, how to shelter from the sun, and what animals to avoid. Real life stories demonstrate how humans can survive on their own on an island.

Education is one the best ways to stop an epidemic. People cannot help stop the spread of a virus if they do not know what to do and why it matters. Discover more in What Is an Epidemic?, part of the Understanding Viruses series.

Read about extraordinary animal migrations by water, from tremendous upstream journeys by Pacific salmon to the extreme long-distance migration of the humpback whale. Interesting facts and obstacles are highlighted, and a sidebar details how humans impact each migration.