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.

La saga de los Bernoulli, una familia burguesa de comerciantes y farmacéuticos, está repleta de fascinantes historias de aventuras migratorias, de desafíos intelectuales y sobre todo de mucha matemática. La época en que se desarrollan los acontecimientos narrados está impregnada de un pensamiento humanista y renovador. El ritmo de desarrollo de la ciencia en esta época se acelera. La solución de problemas científico-técnicos se convierte en asunto de importancia estatal. El dominio de los recursos del nuevo cálculo creaba una sensación de posibilidad de resolución de semejantes...

This informative, Spanish-translated book teaches early readers about the importance of government and how it impacts our lives. Readers will learn about taxes, the three branches of government, voting, and more. Engaging, primary source documents and images keep students reading as they build their literacy skills and social studies content knowledge.

What do lions do? Let's find out! In this book, young learners ages 0-3 can explore facts about these amazing animals in both Spanish and English. These appealing board books are illustrated with vibrant photos, presenting simple facts about a variety of wild animals. Side-by-side English and Spanish text lets children and caretakers compare words in two languages. This series is perfect for building early bilingual literacy skills!

Ofrece ejemplos de animales que viven en bosques tropicales, incluyendo el elefante pigmeo de Borneo, el perezoso de tres puntas y el gorila plateado.