Cómo podemos utilizar la palanca?

Define planos inclinados, explica sus funciones, y sugiere experimentos sencillos para demostrar cómo funcionan.

Follows the Thirteen the Amendment that freed the slaves, end of the war, and the death of President Abraham Lincoln.

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 Thirteenth Amendment That Freed The Slaves, The End Of The War, And The Death Of President Abraham Lincoln.

From England's quaint country roads to a palace fit for a queen, readers have so much to discover about this amazing country! This title covers information like England's common foods, its largest cities and capital, plants and animals, and things to see and do. Aligned to Common Core Standards and correlated to state standards. Abdo Kids Jumbo is an imprint of Abdo Kids, a division of ABDO. Translated by native Spanish speakers--and immersion school educators.

El deseo de escribir, nace ante la necesidad humana de compartir ideas, sentimientos, historias, vivencias, etc. Si usted lector, ha pensado en iniciar el oficio de la escritura y tiene dudas al respecto, permítame decir, que esta guía le despejará la mayoría y probablemente le mostrara otras que no había contemplado. Sólo necesita cumplir un sencillo requisito y cito al escritor Robert Penn Warren: “Los verdaderos escritores son aquellos que quieren escribir, necesitan escribir, tienen que escribir”. Ahora nombraremos algunas de las reglas a seguir para la escritura y en esta...

It doesn't take a lot to conserve electricity. Taking action can be as simple as turning off the lights when you leave a room or using "people power" instead of cars to get around. Kids learn this and more about what they can do to help in 10 Things I Can Do to Save Electricity. Now in Spanish.

Until just over 150 years ago, northern Mexico extended thousands of kilometers farther than its current border with the United States. Many different indigenous groups flourished in that region before the Conquistadors arrived. What we know about their lives and customs is the result of archeological discoveries and the chronicles of the first Spanish priests and soldiers that had contact with them.