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.

Princess Diana lived much of her life in the public eye and suffered for it. She should not be remembered only for her fashion choices and her uncomfortable celebrity, but for her activism and generosity. Students will learn more about this fascinating and inspiring leading lady in this text that explores Princess Diana’s life and her social achievements.

Dani y Evan quieren ganar la Walanga. Deberán ser los mejores en las pruebas de escalada, resistencia y valentía. ¡La competición está muy reñida! Pero hay alguien que tiene otros planes: expulsarles del Santuario. ¿Podrán Dani y Evan escapar de sus trampas? ¿Ganarán la Walanga? No esperes ni un minuto más para descubrirlo... ¡empieza la aventura!

Novedosos libros que nos acercan al modo de vida de antiguas civilizaciones, con vasta informacion y laminas transparentes de acetato que al levantarlas descubren construcciones caracteristicas de cada cultura.

La Ciudad de Massi ha sido arrasada, un auténtico caos se ha desatado en sus calles. Edificios en llamas, aldeanos corriendo como locos, y una tétrica banda sonora compuesta por gritos de terror y sirenas de ambulancia. ¿Quién ha podido provocar semejante apocalipsis? Aunque parezca mentira, el propio Massi es el principal sospechoso. Varios testigos aseguran haberlo visto. Sí, sí, era él, claramente: con su inconfundible armadura negra y amarilla. Massi no recuerda casi nada de la noche anterior: un atracón de jalapeños lo dejó completamente grogui. Solo recuerda haber hecho un...