Salvar la cultura en una catástrofe

Con la idea de que pensar y discutir sobre problemas matemáticos podría generar el mismo entusiasmo que practicar un deporte en equipo, en la antigua Unión Soviética surgió el singular movimiento cultural de los CÍRCULOS MATEMÁTICOS, que dejó tras de sí un intenso rastro de problemas, enfoques y textos. CÍRCULOS MATEMÁTICOS recoge parte de aquella emocionante experiencia.Es un libro de divulgación matemática dirigido a todos aquellos que sienta curiosidad por el juego mental que implican las matemáticas y que deseen indagar en sus ramas menos conocidas. También es un libro...

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.

This book introduces readers to the first inhabitants of the Wild West. Readers will learn about Native American struggles over land and the historical and heartbreaking Trail of Tears. Through rich text and historic photographs, readers will learn about how life changed for Native Americans when white settlers started moving west. Engaging text explains important people and events, including the Great Sioux War of 1876 and Crazy Horse. "Truth or Myth?" fact boxes shed light on the real experiences of Native Americans while sidebars provide additional opportunities for readers to deepen their ...

Ilustraciones encantadoras y textos llevan a los estudiantes en un viaje al huerto de manzanas. Allí aprenden cómo crecen las manzanas y hacen sidra y tarta. Las preguntas de pensamiento crítico y comprensión ayudan a los lectores a involucrarse con la historia. Ahora en español! Through charming illustrations and text, readers follow a young girl to the apple orchard where she learns how apples grow and makes cider and pie. Critical thinking and comprehension questions help readers engage with the story. Now available in Spanish!