La fiebre del oro

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...

Take a trip to the British Museum as you explore its fascinating objects and geometric shapes! This famous London museum was built for exploration - and for learning geometry. Learn about its history and artifacts as you build your geometry skills. This Spanish math book seamlessly integrates the teaching of math and reading, and uses real-world examples to teach math concepts. Text features include images, a glossary, an index, captions, and a table of contents to build students' vocabulary and reading comprehension skills as they interact with the text. The rigorous practice problems,...

Take a trip to the British Museum as you explore its fascinating objects and geometric shapes! This famous London museum was built for exploration - and for learning geometry. Learn about its history and artifacts as you build your geometry skills. This Spanish math book seamlessly integrates the teaching of math and reading, and uses real-world examples to teach math concepts. Text features include images, a glossary, an index, captions, and a table of contents to build students' vocabulary and reading comprehension skills as they interact with the text. The rigorous practice problems,...

Did you know that swimming pools are used to train astronauts? Athletes use swimming pools to train when they're injured, and doctors use them to help patients feel better. Learn how swimming pools and aquatic therapy help all kinds of people! Created in collaboration with the Smithsonian Institution, this Spanish book ignites a curiosity about STEAM topics through real-world examples. It features a hands-on STEAM challenge that guides English language learners through every step of the engineering design process. Inspire students to pursue a STEAM career with career advice from a real person ...

Antonio Machado es uno de los poetas más importantes que ha tenido nuestro país. Leonor, su esposa y su musa, era para él al alegría, la vida, la felicidad. Pero también la sabiduría. No la de los libros o las escuelas, sino la de las cosas pequeñas, esas cosas que Antonio convirtió en poemas. Poemas tan hermosos que hoy en día, verso a verso, seguimos recordando. Carmen Posadas nos acerca a Machado en el setenta aniversario de la muerte del poeta, con un texto emotivo que nos muestra que sin amor no hay vida, y tampoco poesía.

George W. Bush grew up in a prominent political family in Texas. After serving as Texas governor, Bush followed his father's footsteps in becoming President of the United States. This Spanish-translated biography allows readers to discover the life of George W. Bush and explore some of the impacts he made as president through acts like No Child Left Behind. Readers will also learn of the many unexpected challenges Bush faced, such as the al-Qaeda attack on September 11, 2001, the War on Terror, and the Iraq War. The engaging facts, vibrant images, and supportive text work in conjunction with...

¿Hay algo que mole más que contar chistes con tus amigos? ¡Contar chistes sobre los amigos! ¿Cuántos amigos tienes? ¿1? ¿¿10?? ¿¿¿100??? Tengas los que tengas, en este libro encontrarás por lo menos un chiste para partirte de risa con cada uno de tus colegas. ¿A qué esperas para troncharte de risa?