Exploremos el ciclo de la roca (Exploring the Rock Cycle)

When winter hits, many people in colder climates spend most of their time indoors. But what do wild animals do? Some animals spend winters hibernating. Beginning readers will learn what hibernation is, why some animals hibernate and others don't, and how hibernating animals prepare for their long sleep. Full-color photographs grab readers' attention and allow them to draw connections to the narrative. Readers will love learning about this mysterious, restful time in some animals' lives.

Although Earth is mostly made up of igneous and metamorphic rock, sedimentary rock covers about 75 percent of Earth's land surface. This means it's the most visible kind of rock on Earth. Sedimentary rocks form when sediment accumulates and compacts. Your readers will learn how sedimentary rocks form, the different types of sedimentary rocks, and how people use sedimentary rocks. Fun fact boxes provide readers with additional information. A helpful diagram illustrates how sedimentary rocks form.

When rocks change because of environmental conditions, the new rocks are called metamorphic rocks. A rock's chemical or physical makeup may change because of conditions such as temperature, stress, or pressure. Your readers will learn fascinating facts including where metamorphic rocks are most commonly found, the different types of metamorphism, and how metamorphic rocks are identified. Full-color photographs depict these rocks in nature. A helpful graphic organizer shows how these fascinating rocks form.

Children explore the concepts of big and small in the world around them, from big round pancakes to tiny little seashells.

Abdel es un joven tuareg acostumbrado a la vida nómada. Todo va a cambiar el día en que su padre, Yasir, decide abandonar el desierto y viajar a España. Atravesar Marruecos no será fácil, y mucho menos cruzar el estrecho de Gibraltar. Sin embargo, hay que intentarlo si eso supone alcanzar la libertad, aunque tengan que ocultarse.Ahora que comienza una nueva vida en España, no todo es tan fácil como parecía.

¿Sabías que las medusas pican a sus presas? Aprende más sobre las fascinantes criaturas que viven en cada océano de la Tierra. Las fotos frescas y vibrantes involucran a los lectores jóvenes mientras construyen las primeras habilidades de lectura de no ficción. Zap! Did you know that jellyfish sting their prey? Read on and learn more about the fascinating creatures that live in every ocean on Earth. In this Spanish-language edition, carefully leveled text and fresh, vibrant photos engage young readers as they build early nonfiction reading skills.

El crucero es uno de los barcos más grandes del mundo. El barco crucero más grande puede llevar unas 8.700 personas a bordo. Aprende más sobre estas máquinas poderosas en Los cruceros, uno de los libros audiovisuales de AV2. Cruise ships are some of the largest boats in the world. The biggest cruise ship can carry about 8,700 people. Learn more about these mighty machines in Cruise Ships, an AV2 media enhanced book.