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

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.

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.

Learn about the Victorian era while building your knowledge of equivalent fractions! Students will learn fractions while engaged in reading about the innovations of the Victorian era. This Spanish book combines mathematics and literacy skills, and uses practical, real-world examples of problem solving to teach math and language arts content. The glossary, index, and table of contents will further understanding of reading and math concepts, and the full-color images, practice problems, and math graphs and charts make learning math easy, practical, and fun. The Explore Math sidebars and Math...

¿Tienes que quitarte los zapatos en la entrada?. Descubre por qué los buenos modales hacen que la visita a casa de un amigo resulte estupenda para todo el mundo.

ARTE DE LA ENSOÑACIÓN Vivir como sólo quien sabe ser libre puede hacerlo consumir el tiempo las horas los minutos embriagado hasta lo más profundo por la vida ser siempre distinto y evitar en lo posible el tedio dar a cada nuevo día un sentido pleno y magnífico a las cosas y seguir las pulsiones frenéticas del corazón mirar solamente al cielo cuando esplenda dejar de ser tan tremendista esforzarse en el arte ambiguo de la ensoñación.

Lánzate a la aventura con Spidey, Ghost-Spider y Miles mientras luchan contra el Duende Verde, Doc Ock y Rhino, y se alían con fantásticos amigos como Pantera Negra, Hulk y Ms. Marvel. Mi primer cómic es una serie hecha para niños entre 5 y 8 años, ya sean lectores independientes o principiantes. Estas historias cuentan con textos sencillos, viñetas claras y entretenidas historias sobre sus personajes favoritos