Algoritmos: la base de la programación de computadoras (Algorithms: The Building Blocks of Computer Programming)

From art and architecture to politics, philosophy, and mathematics, "western civilization" owes a great deal to the achievements of ancient Greece, but what do we really know about this long-gone civilization? How did geography influence the politics of the Greek city-states? What's the difference between an agora and an acropolis? This book takes readers several thousand years into the past, when independent city-states ruled the Mediterranean Sea, to find the answers. Full-color photographs and maps, accompanied by accessible text, introduce readers to the many contributions the ancient...

There are many steps in the nitrogen cycle that include difficult concepts and words: denitrification, prokaryotes, ammonia, and more. With the help of this understandable book, even struggling readers will grasp this cycle of nature. Low-level language, fact boxes, and an extended glossary provide readers with essential vocabulary explanations that allow them to further understand each step of the cycle. Full-color diagrams aid readers' comprehension as they move through the cycle from start to finish, and then around again.

Un día un conejo hambriento salió a buscar algo que comer. Todo estaba cubierto de nieve, y no encontraba nada. Finalmente vio una manzana roja que colgaba de un árbol. Pero no podía alcanzarla. Y fue a buscar ayuda... Un precioso álbum sobre la cooperació

Read Along or Enhanced eBook: Find out what surfers need to know to have fun and stay safe in the water in this engaging, Spanish-translated nonfiction title! Invite readers to learn about the history of surfing, surfing culture, what equipment is needed, and more using vibrant images and informational text in conjunction with math skills and upper-level features such as chapter format, a glossary of terms, and an index.

Sunny Hathaway tiene un amigo, su perro Flamy, y tres crueles enemigos, sus compañeros de colegio, Hank, Larry y William. Estos lo ridiculizan y humillan a la más mínima oportunidad. Sin embargo, cuando lo obligan a ir al cementerio y a entrar en la tumba de la bruja Jill para probarse su anillo, las cosas cambian.