Ondas sonoras y la comunicación (Sound Waves and Communication)

Light can travel faster than anything else in the universe. But what exactly is light, and where does it come from? This nonfiction Spanish book teaches students all about light, and introduces them to important scientific concepts and vocabulary terms like infrared, ultraviolet, photos, and visible spectrum. The intriguing images, detailed diagrams, and stimulating sidebars will keep students connected to the text. The fun lab activity provides a real-world learning experience that supports STEM instruction. Aligned to state and national standards, the leveled text supports differentiation....

El siglo XXI demanda nuevas habilidades, la tecnología exige progreso constante y el alto nivel competitivo en el mundo de lo negocios requiere que cada emprendedor y empresario tenga consigo un ejemplar de Trilogía de los Negocios. La Doctora Abigail le revela en este libro los principios de cada hombre y mujer exitosos han utilizado para lograr lo que hasta ahora tienen. Parece pretencioso el comentario, pero después de leer el primer capítulo usted estará de acuerdo conmigo que este comentario se queda corto. Al terminar de leer este tomo usted habrá adquirido conocimiento,...

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.

Para jóvenes lectores que además ejercen de espías, detectives, conspiradores y aventureros, este libro presenta todo tipo de sistemas, de lenguajes y de ingenios para crear y ocultar mensajes secretos. Desde las órdenes cifradas de Julio César, hasta el extraño mensaje en clave que escribió el hombre de la máscara de hierro, el código que utilizó Sherlock Holmes o la fabricación de tinta invisible, con ejercicios prácticos y un diploma acreditativo.

Knowing how to listen is essential to learning, growing, and getting along with others. This gentle, encouraging book introduces and explains what listening means, why it’s important, and how to listen well. Realistic examples and inviting full-color illustrations bring the concepts to life. The focus throughout is on the positive results of being a good listener. Made to be read aloud, this book also includes a special section for adults, with ways to reinforce the skills being taught, questions to invite lively discussion, and listening games to play. Now children and adults can enjoy our ...