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.

Vanessa Len debuta con Only a monster, una maravillosa novela young adult con toques de fantasía oscura, amor y rencillas familiares. Nunca lo olvides: nadie puede saber lo que eres, lo que somos. No hables sobre nosotros... ¡No hables sobre los monstruos! Joan ha descubierto una terrible verdad: tanto ella como su familia son monstruos con poderes extraordinarios. Por si esto fuese poco, su compañero de trabajo no es un chico cualquiera, sino un legendario asesino y cazador de monstruos que hará lo que haga falta para destruir a su familia. Para salvarse a sí misma y a sus seres...

Como bien sabes, es común que todos nos relacionemos de una manera u otra; igual pasa con las ciencias que explican el mundo en el que vivimos, son como una gran familia. La Ciencia, en general, es como la abuelita; Matemáticas es la madre, trata de explicar cómo se formó el Universo con ayuda de sus hijas: Astronomía, la mayor; Geología, la que sigue; Biología, la hija sándwich, y las gemelas Física y Química, que no por ser las más pequeñas, son las menos importantes. Cuando la hermanas juegan entre ellas, crean otras ciencias interesantes en las que participan figuras de...

Celebrating tolerance and acceptance, each title in this constructive and accessible series focuses on the rewards and challenges of having a friend with a disability. Everyday situations are accompanied by informative sidebars that provide details about the highlighted disability.

Every living thing you see is made up of tiny cells. Each of these cells has its own job to do. They work together to do everything an organism needs to stay alive. That's why biologists often call them the "building blocks of life." Learn all about plant and animal cell theory and structure with this Spanish science reader that brings the power of science and informational text to students at a level they can understand. Introduce students to STEM topics and new vocabulary terms like osmosis, diffusion, organelles, and active and passive transport with this nonfiction book that is aligned to ...