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There are one, two, three, four, five dogs to walk. But there is only one dog walker. Collect data on dogs, their leashes, and their names! This Spanish math book combines math and reading skills and uses real-life examples of problem solving to teach subject-area content. The dynamic images, detailed sidebars, practice problems, and math diagrams make learning how to collect data easy and fun. Text features include a table of contents, a glossary, an index, and captions to build vocabulary and increase understanding of math and reading concepts. An in-depth problem-solving section provides...

What would happen if the Moon disappeared? We would try every possible way to get it back. As in everyday life, this book shows us that the answers to our problems are sometimes so close we just can't see them.

“La utopía reptante y otros relatos recopila una generosa muestra de la narrativa de José Siles González, que ha incluido en este volumen antiguas historias y otras de nueva planta. A lo largo de los dieciséis cuentos, que abarcan desde el neolítico hasta un futuro tan indeterminado como virtual, el autor ofrece un muestrario de personajes estrafalarios y entrañables, irremediablemente perdidos en un mundo que se está convirtiendo en la caricatura de sí mismo.” Joaquín Juan Penalva, Escritor y crítico literario “Deudor de nadie, si acaso de Tom Sharpe, y fiel a las señas de...

Did you know that jellyfish are found in every ocean? A group of jellyfish is called a bloom. Learn more about these stinging drifters in All About Jellyfish.

"Some things are so huge or so old that it's hard to wrap your mind around them. But what if we took these big, hard-to-imagine objects and events and compared them to things we can see, feel and touch? Instantly, we'd see our world in a whole new way." So begins this endlessly intriguing guide to better understanding all those really big ideas and numbers children come across on a regular basis. Author David J. Smith has found clever devices to scale down everything from time lines (the history of Earth compressed into one year), to quantities (all the wealth in the world divided into one...