El ferrocarril transcontinental (The Transcontinental Railroad)

Learn how to help others in your community. This exciting Spanish nonfiction book describes the many ways that volunteers make a difference, from cleaning up parks to helping in food banks. Perfect for young readers, the book includes a short fiction stor

La agricultura comercial es una infraestructura esencial, que proporciona sustento diario a miles de millones de personas. En este sentido, la producción avícola no es diferente. Sin embargo, las granjas industriales de pollos tienen una larga historia de abusos, violaciones y políticas cuestionables. El alarmante estado de la industria avícola hace que cada vez más familias opten por obtener productos de pollo de agricultores más pequeños y saludables. Según el World Watch Institute, el 74% de la carne de aves de corral del mundo y el 68% de los huevos se producen intensivamente, es...

If it were possible to shrink down and take a tour of a human body, would you want to go? Readers will get that chance when they explore the body of a guy named Marty, who will let them check out the body systems that keep his heart beating and his body moving every day. With the help of a tiny ship that goes through his ears and all the way through his digestive system, readers will learn exactly what they are made of with this great book.

Readers may never expect that they might free fall to Earth, but if they have ever dived into a pool, that's exactly what they've done. This book shows readers how Newton's three laws of motion affect divers, skydivers, and mountain climbers' movements. Readers discover who uses gravity, and who works against it, and all other forces that contribute to a successful dive or climb. After reading this book, readers can decide if they will ever be interested in engaging in one of these extreme sports.