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.

Con este libro ilustrado aprenderás a dibujar gatos de caricatura con sencillas lecciones paso a paso.

Life on Earth depends on carbon. In fact, about 18.5 percent of a human body's mass is carbon. How carbon is taking in and given off through animals' breathing, the burning of fossil fuels, and more can be shown in the model known as the carbon cycle. Though this concept can be confusing, all readers have a chance to understand this concept through the text and simple diagrams in this book. Both struggling readers and those looking for review can find the most important components and vocabulary of the carbon cycle in low-level, accessible text.

Recounts the life of the Puerto Rican baseball star from his childhood poverty to his career with the Pittsburgh Pirates, and discusses his humanitarian efforts, his untimely death, and his contributions to the sport.

"La fábula de la Montaña Mágica" nos hace creer de nuevo en los misterios del bosque, de los árboles, las plantas y los animales. Enanos, ninfas del aire y seres de la oscuridad, rescatados de los cuentos de hadas, nos acercan a su propio universo en el que todo puede ocurrir y en el que a cada vuelta del camino encontramos una aventura aún más fantástica. Un mundo mágico se esconde en el interior de una montaña muy especial, donde la más increíble de las historias nos espera para poder salvar no sólo la Montaña Mágica, sino también todo el planeta. ¿Podrán los protagonistas...