Cómo podemos utilizar la palanca?

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

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.

Young students will be enthralled with compelling portraits of famous figures who devoted their lives to improving the world. Includes historical photos and illustrations.

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

Rabbit burrows play an important part in the life of a rabbit. A burrow provides a place to live, a place to raise baby rabbits, and a place to stay safe from predators. This volume, which was written to support elementary science curricula, examines the role a burrow plays in the survival of a warren, and how that in turn helps rabbits contribute to ecosystems around the world. The text’s age-appropriate, science-rich content focuses on rabbit behavior and encourages readers to draw connections between what they learn in science class and what they see outside. This text is complemented by ...

Fly into some learning fun by introducing young readers to animal classifications by explaining how birds are grouped. This nonfiction book explores the differences and similarities between several classes, families, genera, and species of birds, and how animal classification works—part of the Los animales también tienen clases series. Fun Children's Book Features: This Spanish science book includes a glossary, index, comprehension questions, and reading activity to encourage further learning and reading comprehension skills. 24 pages with vibrant photographs Guided reading level O About...

La vida cristiana transcurre dentro de un contexto, y el nuestro es la postmodernidad, una de cuyas características es el cambio constante y acelerado que nos hace cada vez más difícil orientarnos para saber vivir como seguidores de Jesús en el mundo actual. «Líderes Posmo» nos acercará a diferentes personajes de la Biblia; veremos las situaciones y los retos a los que se tuvieron que enfrentar. Así nos daremos cuenta del increíble paralelo existente con la vida actual. De los principios que ellos llevaron a la práctica, obtendremos la sabiduría que necesitamos para vivir como...

Following the bestselling "Family Pictures, In My Family/En Mi Familia" is Garza's continuing tribute to the family and community that shaped her childhood and her life. Vibrant paintings and warm personal stories depict memories of growing up in the traditional Mexican-American community of her hometown of Kingsville, Texas.