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.

Over the years, people have looked for ways to improve our imperfect sight. This has led us to the world of optics, which is the study of light and how it travels. What are some of these innovations that have changed how we see the world, and how do they work? Find the answers to these questions with this Smithsonian Informational Text! Created in collaboration with the Smithsonian Institution, this text builds students' reading skills while engaging their curiosity about STEAM topics through real-world examples. It features a hands-on STEAM challenge that guides students through every step...

Ramiro Villaseca es un chico de procedencia humilde. Su madre trabaja en una vaquería y el padre desapareció antes de que él naciera. Un amigo de la madre se ha encargado de la educación del niño y una de los valores que con mayor interés le ha inculcado es la ambición: “abandona este mundo de pobreza, hijo mío, e intenta buscar una vida mejor”. Ramiro sigue los preceptos de Isidro y a la primera oportunidad que tiene, se casa con Julia, la hija de un posadero. El matrimonio no resulta como él había pensado, y un día en el que se encuentra sólo en la taberna, un viajero que...

“Dino” Don Lessem brings readers face-to-face with various dinosaur species, detailing their habitats, way of life and how they became extinct. An acclaimed dinosaur expert, Don Lessem has written more than 30 children’s books, writes a popular dinosaur column in Highlights magazine, and was an adviser for Jurassic Park. Take a trip through dinosaur time to meet these duck-billed dinosaurs face-to-face: Corythosaurus could honk through the top of its head! Gryposaurus had hundreds of grinding teeth! Parasaurolophus could smack enemies with its strong tail! Plus, you'll get to know...

¡Otra vez se ha perdido Gocú! El gatito se subió a un globo aerostático que lo lleva de paseo por las vocales. Cada vocal ofrece divertidísimas actividades para los recién iniciados en el proceso de alfabetización (a partir de los 4 años).