Introduces important symbols of the United States, including the flag, the Liberty Bell, and Mount Rushmore.

Introduces the different forms water can take on Earth and describes the steps in the water cycle.

Introduces endangered and extinct species and explains how human actions affect animal populations.

Introduces young readers to the basics of organic gardening by noting its benefits and offering tips for getting started.

Teaches how groups change when you add two or take away two.

"Major" loved to ride his bike. He raced and did trickes, winning award after award. He became one of the best bicycle racers in the United States in just a few years. What happened to this amazing athlete?