Cómo podemos utilizar la polea?

Defines screws, 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.

The Uses Of Wind Energy Is The Topic Of This Book. Explains The Positive And Negative Impact This Form Of Energy Can Have On Our World.

Solar Energy Is Explained. Included In This Book Is Where It Comes From, Who Uses It, And The Positive And Negative Benefits Of Using It. Correlated To Common Core, Texas TEKS, Virginia Sols, And Georgia Performance Standards.

Teach students about trading and buying goods and services. In this Spanish-translated book, readers will learn about supply and demand, and learn the difference between wants and needs. Featuring images that support the informational text, students will build social studies content-area literacy and reading skills.

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...

Clara y Jorge acaban de mudarse a una urbanización porque la convivencia con los vecinos del edificio donde vivían era insoportable. Esperan que ahora todo sea diferente, pero arrastran un secreto oscuro del que no pueden librarse y, aunque sus nuevos vecinos los acogen con entusiasmo, pronto descubrirán cosas terribles de su pasado que abrirán una grieta insalvable entre ellos. Los perros siempre ladran al anochecer es un relato de suspense que se lee de un tirón y que al mismo tiempo arroja luz sobre la condición humana, las dudas que lastran la existencia y la dificultad de enterrar...

Learn about the process of electing government leaders! This Spanish nonfiction book explains how elections work and ways for individuals to stay involved in government. The book also includes a related fiction piece, a glossary, an extension activity, and other helpful features. Perfect for young readers, this book will show students how to be informed citizens when it comes to elections and campaigns. This 32-page full-color Spanish book describes the presidential election process with examples from United States history. It also explores essential topics such as leadership and civic duty...