El sistema óseo (The Skeletal System)

¡Las ballenas azules son los animales ma ́s grandes que jama ́s hayan vivido en la Tierra! Pero no es fa ́cil verlas porque esta ́n escondidas en las profundidades del mar. Descubre fascinantes secretos y datos sobre estos majestuosos mami ́feros acua ́ticos.

Computer science is all around us, at school, at home, and in the community. This book gives readers the essential tools they need to understand the computer science concept of simulations. Brilliant color photographs and accessible text will engage readers and allow them to connect deeply with the concept. The computer science topic is paired with an age-appropriate curricular topic to deepen readers' learning experience and show how simulations work in the real world. In this book, readers learn about American Revolution reenactment and how it simulates events from the past. This nonfiction ...

La historia del viaje oceánico renacentista está plagada de episodios de gran intensidad, pero pocos, como esta Carta del descubrimiento de Brasil, dirigida al rey Manuel I, son capaces de recoger, sin artificio ni metáfora, sin juicio cultural ni rígidos conceptos raciales, el momento privilegiado en que las naves europeas tomaron por primera vez contacto con las culturas de las costas meridionales de América. La Carta, por la que en el año 1500 el escribano Caminha informa al rey sobre las recién descubiertas tierras de la Vera Cruz, es un precoz, impresionista y riguroso tratado...

The gold dollar coin bears the image of one of the most famous Native Americans in U.S. history; Sacagawea. Though much of her life remains a mystery, this book explores the story of this extraordinary woman who helped Lewis and Clark explore the American West. Age-appropriate language and content will help beginning readers understand this fascinating time in American history and introduce them to Sacagawea's captivating story. Exciting photographs help draw readers in, and a timeline of important events will reinforce what they've learned.