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,...

What do churros, macarons, and strudel have in common? In order to bake them successfully, pastry chefs must use fractions! Students will learn comparing fractions while engaged in reading about delectable desserts from around the world. This Spanish book combines mathematics and literacy skills, and uses practical, real-world examples of problem solving to teach math and language arts content. The glossary, index, and table of contents will further understanding of reading and math concepts, and the full-color images, practice problems, and math graphs and charts make learning math easy,...

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,...

Internet security breaches have been in the news of late. Organizations, governments, businesses, and individual internet users are all at risk. This book introduces readers to the importance of cybersecurity and addresses the current risks from hackers, viruses and other malware, identity thieves, and other online perils. It provides concrete measures that young digital natives can take to protect themselves and their computers, smartphones, and other devices. This volume's lively, cautionary narrative and useful tips will help readers effectively defend their identities and data.

Spanish Language Edition This Spanish version of The Picture Bible New Testament is as classic as the English version. It contains full-color comic format stories of the New Testament.

Introduce students to what it takes to be a good leader using this Spanish-translated nonfiction book. Engaging, primary source documents and images that support the text will inspire children to practice being a good leader! Early readers will build their literacy skills and social studies content knowledge while learning about leadership.

Los trucos de Nikki para triunfar patinando sobre el hielo. #1: Busca una motivación importante para patinar. #2: Haz equipo con tus mejores amigas, Chloe y Zoey . #3: Mantén alejada a la odiosa Mackenzie. #4: Asegúrate de que sabes patinar. A Nikki Maxwell no le sorprende descubrir que su amor platónico, Brandon, es voluntario en un refugio de animales local. Él es un chico dulce - ¡por supuesto que quiere ayudar a esos perritos adorables! Pero Brandon le cuenta que el albergue está en peligro de ser cerrado, y Nikki sabe que no puede dejar que eso suceda. Así que Nikki y sus amigas...