Un día en... el Imperio Romano (Un día en...)

Dragonflies are large flying insects known for their brightly colored bodies and see-through wings. They are among the fastest insects in the world. Learn more about these amazing animals in Dragonflies, a Fascinating Insects book.

Recess is a time to go outside, have fun, and play. Spend some time problem solving to make sure everyone has fun at recess! This Spanish math book combines math and reading skills and uses real-life examples of problem solving to teach subject-area content. The dynamic images, detailed sidebars, practice problems, and math diagrams make learning problem solving easy and fun. Text features include a table of contents, a glossary, an index, and captions to build vocabulary and increase understanding of math and reading concepts. An in-depth problem-solving section provides additional learning...

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.

Completa biografia ilustrada del gran conquistador Alejandro Magno (356-323 a. C.), al que se ha descrito como "el personaje mas famoso de la antiguedad despues de Jesucristo." Incluye un riguroso y detallado analisis de los acontecimientos mas fascinantes del extraordinario reinado de Alejandro: su marcha hacia la India, sus encuentros con filosofos griegos, magos persas y santones hindues, etc. Contiene mas de 150 ilustraciones, entre las que destacan mapas, obras de arte y fotografias de tesoros y artefactos del momento.