¡Sin resolver! Lugares misteriosos

The need for speed is the motivating factor in this engaging, Spanish book. Readers learn the history of travel from the very slow to the supersonic and beyond, including everything in between. They learn and discover the factors that influence motion for all types of vehicles: land, air, and water alike. They also learn different ways to measure speed and read about energy uses for different vehicles. With greater speed comes greater risk. Readers learn how engineers are always seeking new and better ways to keep people safe as they travel faster and go farther.

What does this Spanish-translated book, a table, and your big toe have in common? They are all solids! A solid keeps its shape and always has the same volume. Read this Spanish-translated book to learn about solids and how they are different from liquids and gases.

Learn the secrets to artful cupcakes, oven-fresh bread, and other delicious baked goods in this delightful nonfiction title. Readers will learn how mathematics helps bakers measure their ingredients to make tasteful treats. Featuring vibrant images and charts, informative text, and fun, intriguing facts, this Spanish-translated nonfiction book will leave children fascinated by all the details that go into baking their favorite treats--like doughnuts and cookies!

In graphic novel format, follows the adventures of Max Axiom as he explains the science behind sound.

¿Te atreves a entrar en el Laboratorio de Plagas de este libro? Aquí estudiamos la historia de las enfermedades más terribles. Si te contagias de alguna, te pondrás enfermo. O peor aún. Muchas de esas enfermedades peligrosas se propagan rápidamente, y entonces miles de personas enferman y mueren: es lo que llamamos una epidemia o plaga. Pero... ¡no te asustes! También estudiamos las soluciones para erradicarlas y te presentamos los tres tipos de gérmenes (los protistas, las bacterias y los virus) y cómo combatirlos. La repugnante historia de enfermedades mortales, explicada por las...

During the American Civil War, the United States was on the brink of falling apart irrevocably. As states seceded and brother turned against brother, hope for reconciliation was dim. This conflict, an essential topic of the social studies curriculum, is skillfully presented from its origins in the Southern slave-trade economy to bloody battles and, later, Reconstruction. Striking photographs and artwork of integral events and people will resonate with readers, while interesting sidebar information gives them more to reflect on about this terrible war and the lessons it taught us.

Young readers will learn about legendary creatures and prehistoric animals in this series, awakening the curiosity of both young and old readers. Une exelente introducción a los dragones chinos para niños, este libro enseña a los jóvenes los animales míticos y las historias chinas basadas en ellos desde hacia miles de años.