La optimización mecánica en el medio acuático

Juro lealtad a la bandera (I Pledge Allegiance to the Flag) teaches students about the Pledge of Allegiance. This book uses intriguing primary source images and documents and simple sentences to engage students in reading as they build their social studies content knowledge. For use in the classroom or at home, this Spanish book includes a simple glossary, captions and an index to introduce informational text features to young readers and provide additional reading support.

The Earth is a remarkable place! In the universe, Earth is the only place that we know for sure has life and non-life. Learn all about interdependence in ecosystems with this Spanish science reader that brings the power of science and informational text to students at a level they can understand. Introduce students to STEM topics and new vocabulary terms like oxygen cycle, stimuli, homeostasis, and micro-organism with this nonfiction book that is aligned to state and national standards. The leveled text supports students reading at above-, below-, and on-grade level. The fun lab activity...

Desiderio Vaquerizo Gil (Herrera del Duque, Badajoz; 1959) es Catedrático de la Universidad de Córdoba, donde ejerce como Profesor de Arqueología desde hace más de 20 años. Ha dirigido numerosos proyectos de investigación, y actualmente encabeza el más ambicioso de ellos, centrado en la ciudad de Córdoba entendida como yacimiento único, que sostiene un amplísimo equipo de investigadores dirigidos por él, y que está situando a la ciudad a la cabeza de los estudios sobre arqueología clásica en España, con repercusiones importantes en toda Europa. Ha publicado numerosas...

A biography of Cesar Chavez, from age ten when he and his family lived happily on their Arizona ranch, to age thirty-eight when he led a peaceful protest against California migrant workers' miserable working conditions.