Exploremos los minerales de la Tierra (Exploring Earth's Minerals)

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.

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.

When Nina, Maricela, and Alejandro decide to help some homeless people living near their school in Los Angeles, the issue of homelessness becomes personal when they discover that it is affecting a friend. With help from their 5th grade teacher, they decide to take action and help those in need. This 32-page realistic fiction book features full-color illustrations, diverse characters, and a short chapter format. Capture the interest of reluctant and struggling readers with hi-lo text.

El libro que usted tiene en sus manos (...) está atravesado por la muerte. Todos los hombres nos mecemos entre esta vida y la otra, cuando zozobramos a bordo de un avión viejo y descubrimos que somos "ateos de tierra firme". O cuando los paramilitares nos dejan libres al admitir que somos los 'payasos' del teatro del pueblo. O cuando, de bien niños, nos pasmamos ante la lucha a muerte de nuestros dos hermanos con sendas muchachas en el catre del amor". Arturo Guerrero "Con El hombre que se mece, Jaime Fernández Molano enfrenta un reto adicional: el de aprehender la realidad en cápsulas...

An introduction to what cowboys do, what their day is like, what they wear, what tools they use, and how people can become a cowboy.

Con la idea de que pensar y discutir sobre problemas matemáticos podría generar el mismo entusiasmo que practicar un deporte en equipo, en la antigua Unión Soviética surgió el singular movimiento cultural de los CÍRCULOS MATEMÁTICOS, que dejó tras de sí un intenso rastro de problemas, enfoques y textos. CÍRCULOS MATEMÁTICOS recoge parte de aquella emocionante experiencia.Es un libro de divulgación matemática dirigido a todos aquellos que sienta curiosidad por el juego mental que implican las matemáticas y que deseen indagar en sus ramas menos conocidas. También es un libro...