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.

On a clear night, you should be able to see the stars. But we cannot always see them. Light pollution prevents us from seeing the stars and causes other problems as well. Learn about light pollution with this STEAM book that will ignite a curiosity about STEAM topics through real-world examples. Created in collaboration with the Smithsonian Institution, it features a hands-on STEAM challenge that is perfect for makerspaces and that guides students step-by-step through the engineering design process. Make STEAM career connections with career advice from actual Smithsonian employees working in...

This book teaches kids about what the Northern lights are and how the sun and Earth's atmosphere causes them. The book is complete with labeled images when needed, simple text, and more facts. Aligned to Common Core Standards and correlated to state standards. Abdo Kids Jumbo is an imprint of Abdo Kids, a division of ABDO. Translated by native Spanish speakers--and immersion school educators.

Limoi bat imintziorik egin gabe jaten baduzu, izenburutik hasita, ohiz kanpoko liburua da. Pamiesek egunerokotasuna preso baten pazientziaz xehatu eta gure ekintza bakoitza puska bakan eta, aldi berean, ezaguterraza bihurtu du. Arruntak diren egoeretatik abiatuz, errealitateak daukan ukitu surrealista baztertu gabe, irakurlearentzat ohikoa, erosoa baina izugarria den mundua sortu du. Estilo preziosista ezin zehatzagoaz, katalanak soberan gramo bat bera ere ez duten hogei ipuin idatzi ditu, gu guztiongan imintzio ezagutezin bat marrazteko.

Desde su gestación como período histórico, la Edad Media se convirtió quizás en la época que más prejuicios, simplificaciones y generalizaciones ha merecido. Incluso hoy día, cada vez que se utiliza el adjetivo ±medieval? para calificar una acción o actitud, se hace siempre con una connotación claramente despectiva: lo medieval es sinónimo de incultura, irreflexión, barbarie y atraso. No en vano, la expresión ±ya no estamos en la Edad Media? sigue utilizándose para expresar indignación ante un hecho intolerable e indigno de una época, la nuestra, en principio más avanzada y ...