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.

Examines the nature of inclined planes and wedges, how they can reduce the amount of force necessary to perform work, and ways in which they are used.

Think you'd like to be a fire fighter? Learn about the special equipment fire fighters use, their role in community safety, and their lives at the station. This book features a comprehensive timeline of the history of firefighting from its origins in ancient Rome through firefighting practices of today plus vocabulary related to fire fighters and fire safety.

Una edición escolar -con texto íntegro y nuevas ilustraciones- de la segunda entrega de las aventuras del capitán Alatriste. Una mujer ha aparecido estrangulada frente a la iglesia de San Ginés. El enigma se complica con los sucesos misteriosos que ocurren tras las paredes del convento, cuando Alatriste es contratado para rescatar de allí a una joven novicia.

A force is a push, a pull, or a turn. Every force has an equal and opposite force. Forces are always with you! They are all around us. Learn about forces with this Spanish science reader that features easy-to-read text. Nonfiction text features include a glossary, index, and detailed images to facilitate close reading and help students connect back to the text. Aligned to state and national standards, the book also includes a fun and engaging science experiment to develop critical thinking and help students practice what they have learned.