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.

Two books in one, this oversized volume shows readers the plants, root systems, insects, fossils, animals, mines, gems, minerals, and man-made wonders such as tunnels, subways, submarines, pipes, cables, and power lines that can be found underground or underwater in an unforgettable visual way. Each page takes you deeper and deeper under the waves or through layers of earth.

Conocida también por Juana de América, consigue junto con Gabriela Mistral y Alfonsina Storni que la voz de las mujeres americanas acceda al lugar que le corresponde en literatura universal.

Surveys the life of the American statesman, lawmaker, writer of the Federalist Papers, and first secretary of treasury under George Washington.

Todos tienen un final, causado por sus propios comportamientos, sus propios hábitos. Alexis dañará a muchos que no conoce, Camila a su familia, Agnes no quiere ser controlada, pero ¿cómo demuestra que merece ser libre? Mateo morirá con toda su vida siendo sueños, mientras que Fernando lo hará con todo lo que conoce siendo trabajo. El camino al cambio está ahí, no es fácil, algunos no sobrevivirán, pero, si lo toman, podrían cambiar su final. Solo necesitan comenzar.