Richard Spilsbury

How do we know about the thousands of people who marched in campaigns for civil rights for African Americans in the 1960s? Where did they march and what happened to them? This book shows how we know about the marchers and their experiences from primary and other sources. It includes information on some historical detective work that has taken place, using documentary and oral evidence, that has enabled historians to piece together the fascinating...

Learn about crystals, what they are, how they are formed, and what they can be used for.

Find out about potential energy and kinetic energy. How does heat move from one substance to another? Why is renewable energy so important? Includes three simple activities or experiments to try.

Discusses the plight of Bengal tigers and why they are near extinction, as well as some of the ways humans can help.

Discusses the plight of American alligators and why they are near extinction, as well as some of the ways humans can help.

Explores the behaviors and daily life of a dolphin pod, as well as their habitat, environmental threats, and the advantages of group living.

"A beginners look at the states of matter for third and fourth grades"--Provided by publisher.

"An introduction to electricity and magnetism for third and fourth graders; includes hands-on activities"--Provided by publisher.