Cómo podemos utilizar la palanca?

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

Follows The Thirteenth Amendment That Freed The Slaves, The End Of The War, And The Death Of President Abraham Lincoln.

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.

Un libro chic, que te hará reír y encontrar tu lado más cool. Una guía definitiva que te mostrará las ventajas de incorporar a tu vida el look, la actitud y el charme perisino con ironía y descaro...

This colorful counting book uses catchy rhymes and vibrant illustrations to help children count from 1 to 20 and then in groups of 10 to 100 using the popular cereal's O's as units. "Food is a major part of every toddler's day, and food is the focus here: holding it, playing with it, eating it, and, also, counting it, so that numbers become a natural part of breakfast, and concepts are learned through crunchy physical facts.

Introduces the geography, history, religion, government, economy, and culture of one of the poorest countries in the western hemisphere.

Antes de volverse abogada, senadora y vicepresidenta de los Estados Unidos, Kamala Harris era una niña que amaba a los superhéroes. ¡Y, para su sorpresa, cuando miró a su alrededor, los encontró por todas partes! En esta jubilosa y empoderadora memoria ilustrada que habla directamente a la niñez, Kamala Harris lleva a los lectores a recorrer su vida y les enseña que el poder para hacer del mundo un lugar mejor está en todos nosotros. [Críticas/Reseñas]