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.

A partir de un recorrido por la historia y la realidad actual de la biblioteca escolar en España, José Antonio Camacho Espinosa plantea cuáles son las condiciones que deben cumplir éstas.

What is matter and where can it be found? Everything in the world is made of matter, whether it is a solid, a liquid, or a gas. Important ideas about matter such as volume, mass, and how matter changes state are conveyed through a series of easy-to-do experiments.

El libro que ayudará a todos los niños a entender cómo es el Cielo y qué pasa cuando muere un ser querido. La muerte es un tema difícil de abordar con los niños. Este libro es la ayuda que padres, maestros y adultos que tengan niños a su cuidado estaban esperando para comprender el tema en sus propios términos. Con textos sencillos, dirigidos a los niños, y hermosas ilustraciones, la doctora Elsa Lucía Arango explica cómo es el Cielo y qué pasa con los seres queridos que mueren. El libro cuenta además con la asesoría de la reconocida psicóloga Annie de Acevedo para ayudar a los ...

Worksheets designed for use in Spanish immersion classrooms, as a supplement for parents to use with their children for extra practice, or for use by any classroom teacher who wishes to incorporate Spanish instruction in the classroom in the curriculum areas of language arts, math, social studies, and science.