Discusses the history, culture, and people of Uganda.

Discusses choosing a skateboard, clothes and equipment, safety,injuries, how to skateboard, and stars in the field.

Describes the underground railroad which helped slaves escape tofreedom.

Discusses the historical background, from the Treaty of Versailles through Hitler's rise to power, that led to the horrible and systematic slaughter of millions of Jews by the Nazis during World War II.

Surveys the invention, development, and different uses of rockets, from their beginnings in ancient Greece and China to modern efforts to explore outer space.

Explores the properties of sound through experiments and activities.

Describes the nature, causes, and treatment of this common type of mental illness.

Follows the early history of chemistry, from the time of the ancient world to the creation of modern chemistry in the late eighteenth century.

Discusses animals with no backbones, including protozoans, sponges, worms, mollusks, arachnids, and arthropods.

Provides an introduction to the endocrine system, focusing on the human body's major hormones and the organs affected by them.