Energía del viento

Defines pulleys, explains their functions, and suggests simple experiments to demonstrate how they work.

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.

Los niños aprenden sobre la metamorfosis de la oruga a la mariposa en todas las aulas del mundo, empezando en los primeros grados. ¡Pero nunca la han visto así! Con ilustraciones bellas y coloridas y un texto simple de comprender, este libro cautiva a los niños con su descripción del proceso: de una oruga pequeñita, a una crisálida rara y torpe hasta la mariposa hermosa. Este libro de nivel 1 en español les da a los niños una mirada encantadora de esta belleza natural.

This book introduces you to hippopotamuses, including their size, diet and everyday behavior, which highlights differences between those in the wild and those living in a zoo habitat.

Children will love watching the universe unfold before their eyes in this four-meter foldout llustration of the solar system. They'll be able to discover a unique illustrated journey through space.

It was known as the age of the dinosaurs, but other fascinating creatures roamed the Earth at the same time. Learn about lesser-known animals from the prehistoric era that are no less fascinating! Students will be engaged in reading about ancient animals like Gigantopithecus, Titanoboa, Megalodon, and more as they develop their skills at reading and writing numbers. This nonfiction math book combines math and literacy skills, and uses real-life examples of problem solving to teach subject area content. The full-color images, intriguing sidebars, practice problems, and math diagrams make...