Cómo podemos utilizar el tornillo?

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.

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.

"A finales de los años setenta, un muchacho perteneciente a la clase media salvadoreña trata de introducirse en los movimientos sindicalistas locales con la intención de conocer el incipiente movimiento revolucionario. Allí conoce a una guapa trabajadora de una fábrica textil y se propone enamorarla. Sin embargo, la situación se recrudece en El Salvador. Las refriegas sindicales devienen en combates contra el orden militar y la vorágine termina arrastrando a todo el mundo a territorios y rupturas que nunca imaginaron. Se ha desatado la guerra civil salvadoreña. Róger Lindo, con la...

Este libro tiene 40 páginas para colorear sin estrés, para reducir la frustración y mejorar la confianza. Este libro ayudará a los niños muy pequeños a desarrollar el control del lápiz y ejercitar sus habilidades motoras finas

An introduction to ostriches, including their size, diet, and everyday behavior and highlighting differences between those in the wild and those living in zoos.

It's Ms. Frizzle's birthday and the class tries to bake a cake but winds up inside it, learning about mixtures and reactions that occur when ingredients are put together."