La Energía Solar (Solar Energy)

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.

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.

3 million years ago, men built the first stone tools for hunting. 2 million years ago, men walked in a completely upright position and had already discovered fire. 1 million years ago, men organized themselves in groups... Okay, okay, but what about the women? Where were the women in the meantime?

La anciana tía Patente desea plantar un peral en su jardín. Pero cuando cava el hoyo, la pala choca contra un jarrón bastante rústico. Lo que ignora la buena señora es que el extraño dueño del jarrón desea recuperarlo. ¿Quién iba a decir que la tranquila vida de tía Patente se iba a complicar de esta manera? Una desternillante historia en la que se muestra que nunca es tarde para vivir emociones de nuevo.

Learn about the rich history of Mission San Juan Capistranol: how it started, the people who ran it, the indigenous population, and its legacy today.

Know Your NumbersFind the hidden numbers in these exciting counting books. Count by ones, twos, fives, and tens!