La Segunda Guerra Mundial (World War II)

The early nineteenth century in the United States was a study of contrasts. On the one hand, the Jazz Age brought cultural liberation, vivacity, and reckless consumption; on the other, the Great Depression brought poverty and desperation to millions. Explore these periods in American history through the eyes of the people who lived them.

Explains the basic science of flight, the problems of getting vehicles into the air, different types of engines, and aircraft design, and includes instructions for making aircraft models.

Discusses the origins of corn, its use in Latin America, its spread throughout the world, different kinds of corn, and other uses for corn products.

Introduce diferentes culturas alrededor del mundo contando historias de paredes, desde los murales Mayas en Bonampak, México, hasta la Muralla del norte de Inglaterra.

Simple text and illustrations introduce children to number concepts and teach them how to identify numbers.