Olivia. El genio sinvergüenza (Olivia 1)

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.

Over the years, people have looked for ways to improve our imperfect sight. This has led us to the world of optics, which is the study of light and how it travels. What are some of these innovations that have changed how we see the world, and how do they work? Find the answers to these questions with this Smithsonian Informational Text! Created in collaboration with the Smithsonian Institution, this text builds students' reading skills while engaging their curiosity about STEAM topics through real-world examples. It features a hands-on STEAM challenge that guides students through every step...

Introduce students to one of the greatest presidents in American history, Abraham Lincoln. In this engaging and informational Spanish-translated biography, readers will learn about the amazing things that Lincoln accomplished during his presidency, and why he is considered a hero today. Build reading skills and strengthen social studies knowledge with this engaging book!

¡La Tierra es bastante increíble! Es el único planeta en nuestro sistema solar en el que los humanos podemos vivir. Desarrolle habilidades de no ficción y aprenda todo sobre nuestro planeta de origen con el vibrante glosario fotográfico de este libro y el texto en español apropiado para su edad. Earth is pretty incredible! It's the only planet in our solar system humans can live on. Build nonfiction skills and learn all about our home planet with this book's vibrant photo glossary and age-appropriate Spanish text.