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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.

Students will gain a deeper understanding of the Cold War by delving into major social studies topics in this project-based examination. The volume presents a series of broad questions touching on major themes in the social studies curriculum. Each question is accompanied by several paragraphs examining that question in the context of the Cold War, as well as a detailed project that prompts readers to think critically and present their findings or opinions in a particular format, such as a poster with side-by-side comparisons, a persuasive essay, or a class presentation.

Which animals and plants can survive in a dry desert environment? Readers learn about the living things that make up desert food chains, including cacti, snakes, and scorpions. Colorful photographs of desert life make readers feel like they’re exploring new parts of this habitat with each turn of the page. Fact boxes provide additional information about the creatures that make up desert food chains, and a detailed food web shows how these food chains all come together. The desert is an extreme habitat, and readers will enjoy learning about the extreme plants and animals that live there.

Un viaje interactivo para descubrir Sri Lanka, una isla en el Océano Índico, a través de su gente, vida salvaje, tradiciones, cultura, comida, historia, leyendas y deportes. El libro está completamente ilustrado a mano con objetos escondidos para buscar. Su páginas también tienen preguntas para que los lectores puedan relacionarse con lo leído. Pequeños y mayores lo podrán disfrutar juntos y explorar una tierra nueva a través de la belleza de la ilustraciones, animaciones y sonidos mágicos. ¡Vuela con tu imaginación! *Esta versión interactiva únicamente se puede leer con un...