Las Mujeres en la Química

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.

A digital solution for your classroom with features created with teachers and students in mind: - Perpetual license - 24 hour, 7 days a week access - No limit to the number of students accessing one title at a time - Provides a School to Home connection wherever internet is available - Easy to use - Ability to turn audio on and off - Words highlighted to match audio After trying to fly his kite in different places, Riley finally finds the perfect spot.

¿Qué es ese zumbido? ¡Es una abeja! Con imágenes hermosas, divertidas y auténticas, y un texto comprensible, los niños aprenderán sobre estos increíbles insectos con este libro de nivel 2. Esta serie educativa de libros para principiantes de alto interés para niños está llena de las imágenes maravillosas de National Geographic, acompañadas por textos escritos por autores experimentados en el campo de la literatura juvenil. La contratapa de la edición en rústica incluye una experiencia interactiva basada en el libro. Los libros de nivel 1 refuerzan el contenido del libro con una ...

In this bilingual picture book, astronaut José M. Hernández recounts his childhood as the son of Mexican migrant workers and his life-long dream to travel to the stars.