La edad media

Después de que los zarkianos se hayan hecho con la Materia Oscura, la fuente principal de energía del universo, la Confederación no tiene más remedio que buscar un combustible alternativo... Así que Alex y sus amigos saldrán en busca de la Luz Sólida, una fuente de energía legendaria que nadie ha visto ni nadie sabe dónde está... ¿Serán ellos los elegidos por la profecía para salvar el universo?

Today Jay is getting his first pet. But what will it be - a dog, a cat, a bird, or some fish? It's so hard to choose - until he finds the best pet yet!

This impressive pop-up book tells the story of the Virgin of Guadalupe-one of Latin America's most powerful icons. Beautifully narrated, the text is a mixture of Mexican, Native American, and Spanish styles. Text copyright 2004 Lectorum Publications, Inc.

Computer science is all around us, at school, at home, and in the community. Anyone can learn computer science, even at the elementary school level. This book delves into essential computer science concepts using age-appropriate language and colorful images. The computer science topic is paired with an age-appropriate curricular topic to deepen readers' learning experience. The instructional guide on the inside front and back covers provides: Vocabulary, Background knowledge, Text-dependent questions, Whole class activities, and Independent activities.