El ferrocarril transcontinental (The Transcontinental Railroad)

People today refer to the Midwestern and prairie states as flyover country. During the Civil War, crossing those areas was the biggest obstacle in uniting the East and West Coasts of our divided nation. An act of Congress in 1862 authorized the Central Pacific and the Union Pacific railroad companies to build a railroad that would link the coasts. Seven years later, on May 10, 1869, an overwhelmingly immigrant labor force completed the task when a rail line was join in Promontory, Utah. The states had become united at last.

Un elefante llega a una isla de monos. Éstos se alarman, pues, por desconocido, lo juzgan de peligroso, El elefante intenta establecer amables relaciones, pero el miedo hace que los monos le reciban con muy malos modos. Finalmente, un accidente convierte en héroe a nuestro protagonista y los monos reconocen su error. Sólo entonces le preguntan quién es. Y es que el desconocimiento lleva a juzgar mal a los demás, sobre todo si sólo se tienen en cuenta las apariencias. El argumento fundamental del libro está tratado con mucho humor para suavizar con acierto la dureza de un tema como es...

Light can travel faster than anything else in the universe. But what exactly is light, and where does it come from? This nonfiction Spanish book teaches students all about light, and introduces them to important scientific concepts and vocabulary terms like infrared, ultraviolet, photos, and visible spectrum. The intriguing images, detailed diagrams, and stimulating sidebars will keep students connected to the text. The fun lab activity provides a real-world learning experience that supports STEM instruction. Aligned to state and national standards, the leveled text supports differentiation....

If a person were ever face-to-face with a huge, hungry animal with sharp teeth, they probably wouldn’t care exactly what that animal was! But from a safe location, can we tell whether it was a crocodile or alligator that wanted to take a bite? By examining their jaw structure, teeth, and other physical features, we can easily tell these two animals apart! Graphic organizers and amazing images highlight each animal’s habitat and other small differences between the two fearsome creatures, showing readers just what creature is lurking below the waters.

El poderoso tridente del rey Tritón ha traspasado la barrera mágica que mantiene a los villanos encerrados en la Isla de los Perdidos. Aprovechando la ocasión, la eterna rival de Mal, Uma, hija de Úrsula, la bruja del mar, se ha propuesto adueñarse del preciado objeto y ha reunido una tripulación pirata junto a Harry, hijo del capitán Garfio, y Gil, hijo de Gastón. Mientras tanto, una tormenta se cierne sobre Áuradon. Cuando Mal, Evie, Carlos y Jay descubren que el tridente ha desaparecido, saben que tienen que hacer cualquier cosa por recuperarlo antes de que caiga en las manos de...