Donde Va El Correo?

Explains the basic science of flight, the problems of getting vehicles into the air, different types of engines, and aircraft design, and includes instructions for making aircraft models.

This book is a comprehensive, practical presentation of the principles of behavior modification and guidelines for their application. It teaches forms of behavior modification ranging from helping children learn necessary life skills to training pets, to solving personal behavior problems.

La estética de la Baja Edad Media, de la mano de la escolástica, aporta a la metafísica de la proporción y a la metafísica de la luz un sistema conceptual. Ésta es, de hecho, la “primera sistematización” del vocabulario estético. La antigüedad había trabajado ciertos contenidos de este vocabulario, pero no había construido ningún sistema que garantizara un cierto rigor de uso. Será la Baja Edad Media, gracias al énfasis puesto en la obra aristotélica y especialmente en el “organon”, la que ofrecerá a la estética su primera sistematización conceptual que, además,...

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.