El ferrocarril transcontinental (The Transcontinental Railroad)

A lo largo de nuestro crecimiento como especie dominante, hemos salpicado la historia de objetos confeccionados por nosotros con un fin específico: herramientas, máquinas, objetos, etc. todos ellos bajo un solo nombre: inventos. Este libro pretende ilustrar la importancia de la creación de objetos (de la inventiva), como capacidad inherente al desarrollo de la humanidad tanto presente como futura. Para llevar a cabo este objetivo, este libro hace una descripción de cómo el hombre ha ido convirtiendo ciertos objetos naturales en instrumentos de gran utilidad y sofisticación a lo largo...

The need for speed is the motivating factor in this engaging, Spanish book. Readers learn the history of travel from the very slow to the supersonic and beyond, including everything in between. They learn and discover the factors that influence motion for all types of vehicles: land, air, and water alike. They also learn different ways to measure speed and read about energy uses for different vehicles. With greater speed comes greater risk. Readers learn how engineers are always seeking new and better ways to keep people safe as they travel faster and go farther.

Rhyming text is ideal for building phonemic awareness and phonics skills. This series uses delightful rhyming text and engaging photographs to introduce beginning readers to four common weather conditions. These books build the foundation for reading success and make learning about weather fun!

Tome un viaje a México y mira por que este país es especial. Este texto ayuda a los lectores a aprender sobre la comida, los animales y la cultura de México. Las fotografías de color y las preguntas de pensamiento crítico completan esta divertida mirada a las personas y lugares de México. Take a trip to Mexico and find out what makes this country special. Now in Spanish, this carefully leveled text helps readers learn about the food, animals, and culture of Mexico. Full-color photographs and age-appropriate critical thinking questions round out this fun look at the people and places of...