¿Por qué hibernan los animales? (Why Animals Hibernate)

The rock cycle has been taking place for millions of years. However, geologists have only known about this phenomenon for about 300 years. Young terrestrial explorers are introduced to different types of rocks, where in the cycle these rocks fit, and where in Earth's layers each step takes place. Fact boxes provide readers with fun additional information. A diagram helps readers make sense of the new information they're learning.

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.

Publicado en 1884 “Juvenilia” reúne los recuerdos estudiantiles del reconocido escritor argentino Miguel Cané. El autor novela sus recuerdos sin un orden cronológico, para llevar al lector a través de sus andanzas en el Colegio Nacional de Buenos Aires.

When Paul Revere warned colonists the British army was coming, he helped prepare a nation for battle. This exciting book will take readers from Revere’s life as a silver- and goldsmith to his midnight ride at the start of the American Revolution. Through achievable content and language translated into Latin-American Spanish, English language learners will engage with important historical facts and ideas. A helpful timeline of events and colorful images will enhance the story of one of American history’s most famous folk heroes.

¡Hay nieve en el suelo, y los carámbanos se están formando! Debe ser invierno. A través de fotografías de color descubra qué tipo de actividades la gente hace en el invierno. Las preguntas de pensamiento crítico y otras grandes características hacen que esta edición en español sea una excelente introducción a la lectura de no ficción para niños. There's snow on the ground, and icicles are forming! It must be winter. Through vivid full-color photographs and carefully leveled text, discover what kinds of activities people do in the winter. Age-appropriate critical thinking...

El amor duele, o eso pensaba en aquel entonces, cambié de parecer conforme pasó el tiempo, sin embargo, toda esa transición y cura, las fui dejando aquí, para el amor de quien creí alguna vez la mujer de mi vida. La hice poesía, para recordarla y amarla eternamente, aunque yo muriese entre mis letras ella me encontraría cuando me necesitase. La amé con el alma, se llevó una parte de mí, y es por eso, que lo que quedó lo dejo aquí.