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.

Los limones no son rojos, ni las zanahorias moradas... Eso casi todos lo sabemos. Pero no sabíamos cuán sorprendente y creativa puede ser una introducción al mundo del color para los más pequeños.

Un manual ilustrado que presenta la ciencia como un juego divertido en 26 experimentos de física y química con los que saciar la curiosidad del pequeño lector. Desde la comprobación de la presión atmosférica hasta la fabricación de un periscopio casero.

Did you know that swimming pools are used to train astronauts? Athletes use swimming pools to train when they're injured, and doctors use them to help patients feel better. Learn how swimming pools and aquatic therapy help all kinds of people! Created in collaboration with the Smithsonian Institution, this Spanish book ignites a curiosity about STEAM topics through real-world examples. It features a hands-on STEAM challenge that guides English language learners through every step of the engineering design process. Inspire students to pursue a STEAM career with career advice from a real person ...

Biography of Elizabeth Cady Stanton, a leader in the fight for women's right to vote in the United States.