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.

In 2019, nineteen-year-old outfielder Juan Soto helped the Washington Nationals win the World Series. Read about Soto's journey from the Dominican Republic to Washington, D.C., and see what the future holds for the young superstar.

Una historia sobre guerreros del pasado a los pies de una montaña. La segunda muestra a unos alpinistas del presente tratando de coronarla y, en la cima, alguien misterioso... La pieza que une ambas historias, las páginas centrales de esta obra, las escribirá el lector; solo él tiene la clave. Una estupenda manera de incentivar la creatividad y la imaginación.

Explains the idea of taking turns and emphasizes how important taking turns is to being fair and being a good friend.

Blobfish, pangolin, and flower mantis are just a few of the names of the bizarre bugs and animals that readers will learn about in this fascinating, Spanish-translated nonfiction title. Through vibrant images and photos, informational text, a glossary of terms, and an index, readers will learn some of the strange ways that arthropods, invertebrates, and mammals have adapted over time to camouflage themselves and develop interesting ways to keep predators away.