Cómo podemos utilizar el tornillo?

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.

El Mayflower es un barco que ha llegado a ser célebre en la historia de los Estados Unidos porque en 1620 transportó desde Inglaterra al grupo conocido como "los peregrinos", quienes serían los primeros colonos europeos en establecerse en Norteamérica. Ellos zarparon desde el puerto inglés de Southampton y bautizaron como Nueva Inglaterra a la tierra que los acogió. Como señala este libro, el Pacto del Mayflower designa el acuerdo que los hombres adultos de esta comunidad firmaron a bordo del barco para fijar criterios generales que sirvieran como fundamento para el gobierno de la...

Durante veinticinco años Clara Ribalta es la hermana Nazaret dentro de un asilo de ancianos en Córdoba, pero un deslumbrador descubrimiento la transformará de nuevo en Clara Ribalta. Las afueras de Dios trata del itinerario físico y espiritual de esa mujer, que vive y ama hasta la muerte y más allá. El amor es el único alimento de su cuerpo y su alma. En muchas de sus manifestaciones: el divino, con su noche oscura, y también el humano; el que asciende a las cumbres más altas y el que se entrega del cuerpo; el amor franciscano a todas las criaturas y el amor a los ancianos, que...

Tells the story, through graphic novel format, of Harriet Tubman and her life as a leader on the Underground Railroad.

Five and counting! So far, astronomers have discovered five dwarf planets in our solar system. Pluto, which was once thought of as the ninth planet, is today classified as a dwarf planet. This book looks at the current dwarf planets, characteristics, size, and orbital patterns, as well as the three rules scientists follow to characterize these tiny, round space objects. Every day new discoveries are being made. Who knows how many dwarf planets we will find in the future! This book will allow students to understand that patterns in the natural world can be observed, used to describe phenomena, ...

Read Along or Enhanced eBook: Discover the different ways that people spend, save, and budget their money. In this Spanish-translated nonfiction title, readers are introduced to important personal financial aspects such as savings accounts, putting together a budget and budget analysis, credit and debit cards, and taxes. Through informational text, vivid photos, and helpful graphs and charts that assist in implementing mathematical skills such as percentages, readers will be encouraged to save and spend their money wisely and responsibly.