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

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 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.

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.

"Nueva York, Berlín, París, Moscú, San Petersburgo y México son algunos de los escenarios de esta apasionante novela que se adentra en la vida del poeta vanguardista ruso Vladimir Maiakovski. Un hombre extremo, arrogante, un narcisista que no soportaba que no lo quisieran, un soñador que creía en el futuro y que vivió con una intensidad desbordante su relación amorosa con Lily Brik, permitida y alentada por su marido Osip, en uno de los triángulos más famosos de la literatura mundial. Contagiado por la personalidad de su protagonista, éste es un libro provocador, radical, regido...

Read Along or Enhanced eBook: Take a journey into the wild world of reptiles and amphibians! Readers will learn about crocodiles, lizards, snakes, tortoises, and salamanders. Featuring a glossary, index, colorful images and charts, intriguing facts, and clear, informative text, readers will be sure to be enthralled as they move through this engaging, Spanish-translated book.

Además de la violencia ejercida sobre los opositores y la instauración de un modelo que ponía en el centro de la vida social al mercado, la dictadura de Pinochet se empeñó en forjar una juventud que permitiera proyectar el “nuevo orden” por medio de organizaciones civiles que dieran pie, a medida que estos jóvenes crecieran, a partidos políticos, organizaciones empresariales, think tanks y universidades. Fue la primera vez en la historia de Chile que se instituyeron “juventudes de Estado”, a la manera en que lo hicieran los gobiernos de Mussolini en Italia, Salazar en Portugal...

Mrs. Frizzle's class investigates the disappearance of the salmon from the sea and in the process learn about migration.