Agujeros negros (Black Holes)

For many years, people believed there were nine planets that orbited the sun. Now we say there are eight. What happened to the ninth planet, Pluto? What are the different planets like? What exactly makes a planet a planet? These are the many intriguing questions answered with this high-interest book, crafted to be accessible for readers of all levels. Young astronomers will be especially fascinated by the stunning photographs and the "Make the Grade" fact boxes.

How do you truly engage students in learning history? When students make personal connections to the subject, they’re much more motivated to learn. This Spanish book provides firsthand accounts of history that give personal insights into historical events. Students will learn about Alta California by examining the maps, letters, images, photographs, and art that emerged during the Mexican rule of California. With a visually appealing layout, this book features captivating text, fun facts, sidebars, and time lines that help students grasp the essential concepts they need to know at their...

Discover what it takes to be an Emergency Room doctor in this enlightening, Spanish-translated nonfiction title. Readers learn about the hard work and dedication it takes to have a career as an ER doctor and what a typical day is like in the emergency room. From medical school to residency, medical symptoms to diagnosis, children will learn all about the steps it takes to get involved in this profession. This engaging title features vivid photos, helpful charts and diagrams, informational text, a glossary of terms, and an interview with a real-life ER doctor to delight, inform, and encourage...

Rina Komemoski..., una rana fuera de lo común, aprende el valor de la amistad en medio del hambre implacable... ¿Será posible?

Conocer las cosas cuando se estan formando, quiere decir comprenderlas mejor. Los elementos de esta transformaicon pueden verse en gran parte en este libro que Bruno Munari ha compilado, basandose en cincuenta lecciones por el profesadas en la Universidad de Harvard.