Rastreo del tiempo (Tracking the Weather)

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...

Learn how to help others in your community. This exciting Spanish nonfiction book describes the many ways that volunteers make a difference, from cleaning up parks to helping in food banks. Perfect for young readers, the book includes a short fiction stor

Students will develop their math skills while engaged in reading about the importance of honeybees. This nonfiction math book combines math and literacy skills, and uses real-life examples of problem solving to teach subject area content. The full-color images, intriguing sidebars, practice problems, and math diagrams make learning place value relevant and fun. Text features include a table of contents, glossary, and index to increase understanding of math and reading concepts. An in-depth problem-solving section provides additional learning and practice opportunities while challenging...

«¡Por fin ha regresado la fantasía a la literatura!». ANA MARÍA MATUTE. Petra tiene doce años, un padre inventor y una araña parlante y lectora con problemas de insomnio. Pese a todo, su vida se desarrolla sin grandes contratiempos? hasta que el príncipe Rodolfo hace llamar a su padre para encargarle algo: la construcción de un reloj astronómico sin igual, que, una vez terminado, enseguida cobra fama por su belleza. No obstante, Petra pronto se entera de lo que oculta el reloj: un mecanismo capaz de manipular el clima mediante el tiempo. El padre de la niña trata de tranquilizarla, ...

Este libro interactivo, magníficamente ilustrado por Fernando Vicente, acerca a los jóvenes lectores al mundo fascinante y misterioso del antiguo Egipto. Cada doble página es una visita privilegiada a un escenario lleno de magia: la orilla del río Nilo, un mercado de la ciudad de Tebas, la galería de los dioses egipcios, las pirámides, las tumbas de los grandes faraones, y un puñado de juegos y enigmas para aprender y divertirse.

California became a territory in the United States when the Treaty of Guadalupe Hidalgo was signed in 1848. That treaty ended the Mexican War. Several days before its signing, gold was discovered at Sutter’s Mill in what is now Sacramento. The non-Native population of the territory was less than one thousand in 1848, but the gold rush increased that number to one hundred thousand by the end of 1849. The gold rush not only made many people wealthy, it brought ecologic devastation while speeding up California’s statehood. This book richly explores this interesting history.

"Los jóvenes protagonistas viven una vida muy "organizada" en donde no hay libros y las computadoras guardan toda la información conocida. En este mundo descubren, a través de libros que hallaron escondidos en una casa vieja, que anteriormente el cielo no era gris, sino azul, y que había también un círculo que pareća de fuego y brillaba en el centro de él, proyectando sobre la Tierra una luz que no era artificial. El mar no estaba contaminado y había bonsáis gigantes que brotaban del mismo suelo en total libertad. Abril y David -que así se llaman los protagonistas- deciden seguir...