La Energía Solar (Solar Energy)

Defines pulleys, explains their functions, and suggests simple experiments to demonstrate how they work.

This inspiring biographical series ties in with elementary history, science, and social studies curricula, providing teachers with a valuable interdisciplinary resource. With these books, young readers will discover historical figures who devoted their lives to making the world a better place, and changed the course of history. Text copyright 2004 Lectorum Publications, Inc.

Follows the life and career of the French scientist who proved the existence of germs and their connection with diseases.

Reader beware! The biography of R. L. Stine, author of the hugely popular Goosebumps series, is a scary-good time! R. L. Stine began writing stories at the age of nine, after finding a typewriter in his family's attic. (Was it a haunted typewriter? Who can be sure?) Often referred to as the "Stephen King of children's literature," R.L. has created some of the scariest books to have ever been passed around a campfire, leaving readers wide awake at night. With over 400 million copies of his horror fiction novels sold across the world, R.L. Stine is one of the best-selling authors in history.

Say hello to heroes! This book introduces preschoolers to 50 men and women of color who have changed the world! Desde Toussaint L'Overture, el líder de la Revolución haitiana, hasta la jueza Sonia Sotomayor, la primera puertorriqueña jueza de la Corte Suprema de Estados Unidos, estos héroes y heroínas persistieron contra la adversidad y las dificultades para lograr un cambio positivo.From Toussaint L'Ouverture, the leader of the Haitian Revolution, to Justice Sonia Sotomayor, the first Supreme Court Justice from Puerto Rico, these heroes have persisted through adversity and hardships to...

Esta obra es el resultado, principalmente, de los apuntes de Televisión utilizados en los cursos desde hace años han venido siendo actualizados de manera prácticamente constante. El material de la obra abarca los aspectos básicos relativos a los sistemas tanto analógicos como digitales.

Para festejar sus noventa años, un hombre quiere pasar la noche con una joven virgen. En este nuevo acto de magia narrativa, con un fondo musical lujoso y entonado, Gabriel García Márquez logra contar esta historia sin ahorrarnos un solo hecho y sin desperdiciar una sola palabra.