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.

In November 2019, COVID-19 started spreading through the city of Wuhan, China. By March 2020, the first outbreak of the virus had turned into a pandemic. Find out more in COVID-19, 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.

No one knows for sure where polio came from or when the first case took place. It has likely been around for thousands of years. Find out more in Polio, one of the titles in the International Outbreaks series.

People who feel unwell should try to avoid others. This helps stop the spread of the virus. The more contact people have with an infected person, the faster a virus spreads. Discover more in Staying Safe from Viruses, part of the Understanding Viruses series.

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.

This fun and informative survival guide introduces readers to the challenging environment of a rain forest. Useful tips tell you what to salvage from your disabled plane, what you can - and shouldn't - eat, what materials are available in the rain forest for building shelter, and what plants to avoid. Real life stories demonstrate how humans can survive on their own in the rain forest.

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.