Grade 4

Afghanistan borders seven different countries and is a connection point for East, South, West, and Central Asia. It has long been a center of trade and culture, with many different… More →

The sport of cheerleading demands strength, flexibility, and spirit. Cheerleaders dance, tumble, and even fly through the air to encourage sports teams and excite crowds. This book will teach More →

When there is danger in shallow water, Littoral Combat Ships are called into action. These ships can go in water too shallow for other ships of the United States Navy. Armed with high-tech… More →

First mentioned in writings over 2,000 years ago, the lost city of Atlantis continues to puzzle people today. Some people doubt that it ever existed. Others claim that it was real, and that… More →

People train in the martial art of karate to strengthen their bodies and minds. Many can kick and punch with enough force to break wooden boards in half! Young readers will discover how… More →

Indy cars are open wheel race cars that are used in the Indy Racing League (IRL). The cars speed along tracks with straight stretches and sharp turns. Safety is a large concern, as Indy car… More →

Motorcycle drag racing is becoming a very popular motor sport. Amateur racers use their street bikes to drag race, while professionals use drag bikes that can reach 200 miles per hour.… More →

The United States Army uses variations of the UH-60 Black Hawk to perform a wide variety of missions. The Black Hawk has been the primary helicopter of the Army for over 30 years. This book… More →

For thousands of years, people have been fishing in lakes, rivers, and the ocean. Ancient peoples used nets, spears, and their bare hands to catch fish for food. Today, many people fish just… More →

This ancient country is considered the birthplace of Western civilization. Tourists can walk on the grounds of the first Olympic Games, see the mythical Mount Olympus, and visit the Acropolis More →

Did you know that Iraq was home to the oldest known human civilization on Earth? This area used to be known as Mesopotamia, and many different ancient peoples lived there. Readers will learn… More →

Famous for the snowy peaks of the Swiss Alps, Switzerland is a popular destination for skiing and snowboarding enthusiasts all over the world. Swiss alpine culture is also known for a long… More →