La frontera dormida

This Rookie Espanol: Geografia book introduces young readers to the idea of using maps. The book begins with a look at road maps, city maps, and world maps. Young readers learn that numbered lines represent roads and colored shapes represent land and water. The focus is then on a map of the United States, followed by a look at how some maps show elevation, others feature rainfall, and still others include drawings that tell about the people, animals, and resources of a particular place.

The Industrial Revolution brought important changes to America. People began migrating to cities for work, and immigrants began to arrive in American in larger numbers than ever before as they looked for new employment opportunities. Readers explore the impact of the Industrial Revolution on U.S. migration and immigration patterns. As readers learn about essential social studies curriculum topics, engaging historical images and detailed primary sources hold their interest. This transformative period in American history comes alive for readers with each turn of the page.

Ahora en español, la verdadera historia del juguete favorito de todos los niños en el verano, la Súper Pistola de Agua, y cómo fue inventado por accidente. Mientras trataba de crear un sistema de enfriamiento para refrigeradores, Lonnie Johnson inventó sin quererlo el mecanismo de este emblemático juguete. Cuando era niño le encantaban los cohetes, los robots, todo tipo de inventos y, sobre todo, la creatividad. Gracias a su pasión y persistencia por resolver problemas, llegó a ser ingeniero y a trabajar para la NASA. Pero dio el gran salto a la fama cuando inventó la Súper Pistola ...

Defines levers, explains their functions, and suggests simple experiments to demonstrate how they work.