Explains the science behind how sound and hearing occurs, discusses hearing loss and how people who cannot hear communicate, and looks at ways to protect hearing.
Describes the physical characteristics, habits, and natural environment of the huge plant-eating apatosaurus and discusses theories on why it became extinct.
Examines the Battle of Gettysburg, discussing important military leaders, battle strategy, and the lasting impact the battle had on the Civil War and American history.
Describes the historical events surrounding George Washington's famed crossing of the Delaware River, and poses critical thinking questions for the reader to debate his decision making process.
Examines the events leading up to and following Abraham Lincoln's creation of the Emancipation Proclamation, asking readers questions about how they would have handled several of the decisions the president faced regarding slavery.
An introduction to the roles and responsibilities of the executive branch of the United States government, describing how to become president, government branches, and foreign policy.
Provides an overview of the dangers of food poisoning and foodborne diseases, drawing on case studies to examine the diseases caused by ingesting unsafe foods and what government agencies do to protect the food supply.
