10 cosas que puedes hacer para ahorrar electricidad

GRADES K–2: Bring Spanish into the classroom! Introduce early elementary students to the topic of sound waves with this science-themed Spanish title. FEATURES: Kids will learn about how we send and recieve sound waves and complete an activity that supports further comprehension. EARLY BILINGUAL LITERACY: Help young learners strengthen their bilingual skills—add the English version of this title into your collection, too. WHY MY PHYSICAL SCIENCE LIBRARY: This collection introduces a variety of science topics while presenting complicated information in easy-to-understand language and...

Youngsters will smell the burning rubber as they discover the unique features of powerful vehicles, learning how they race, spin, bounce, jump, and sometimes even crash.

A simple biography of the naturalist who founded the Sierra Club and was influential in establishing the national park system.

Desde los albores de los tiempos, miramos hacia arriba y nos preguntamos... ¿qué hay allí? La sonda Voyager 2 ha explorado durante más de cuarenta años los confines de nuestro sistema solar y en estos mismos momentos se aventura en el espacio exterior llevando un mensaje de la humanidad. Este álbum nos transporta poéticamente a la profundidad del espacio exterior en un viaje embriagador más allá del infinito. Since the dawn of time, we look up and wonder ... what is there? The Voyager 2 probe has explored the confines of our solar system for more than forty years, and at this very...