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.

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

Una verdadera clase de paleontología para niños (y para mayores). Asesorada por verdaderos doctos en la materia, Aliki nos adentra en el fabuloso mundo de estos gigantescos animales prehistóricos, haciéndonos ver las diferencias entre varias especies, y l

Practice standard measurement at a farmers market! This engaging title teaches young readers how to measure common food items by their height, circumference, and more, improving their mathematical and STEM skills! Vibrant images, practical examples, and simple mathematical charts help children use standard measurements, showing them how they can use these measurements in their daily lives.

María José grieves at the loss of her mother who died in childbirth. She has difficulty sharing her feelings with her father and the distance between them grows with the appearance of a new woman. Her father gets another job which forces them to move to another neighborhood. The new house is small, but is near an ice cream store owned by Mr. Beto. In the store, María José makes friends with girls and boys her own age, but also meets Mr. Beto and his friends. María José and her friends try to help Mr. Beto when he comes down with a sudden illness.

Now available in Spanish bilingual editions, this best-selling series offers big, brainy science for the littlest listeners. Accurate enough to satisfy an expert, yet simple enough for baby, this clever board book explores the ups and downs of gravity. When baby drops food from a high chair, why does it fall? Beautiful, visually stimulating illustrations complement age-appropriate language to encourage baby's sense of wonder. Parents and caregivers may learn a thing or two, as well!