How Do You Measure Time?

Provides an overview of the design, uses, weapons, and equipment of U.S. Navy submarines. Written in English and Spanish.

Learn all about Major League Soccer. Discover fascinating facts, from record-breaking stars to winning teams and important positions.

From art and architecture to politics, philosophy, and mathematics, "western civilization" owes a great deal to the achievements of ancient Greece, but what do we really know about this long-gone civilization? How did geography influence the politics of the Greek city-states? What's the difference between an agora and an acropolis? This book takes readers several thousand years into the past, when independent city-states ruled the Mediterranean Sea, to find the answers. Full-color photographs and maps, accompanied by accessible text, introduce readers to the many contributions the ancient...

"Hace un año, en una clase de español, Sylvie conoció a Otto, que soñaba con volar como los pájaros. Pero un día, él se fue y la dejó sin noticias. ¿Qué significa ahora el telegrama que envía desde un pequeño pueblo del norte de España?"--Page 4 of cover.

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.