Cómo podemos utilizar el tornillo?

Follows the life and career of the French scientist who proved the existence of germs and their connection with diseases.

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.

Lentas aguas estivales pasan ante los ojos de quien la tímida orilla pasea. Entretanto, barcas, hojas tiernas, alguna flor, la mano abandonada de un navegante, surcan el río. Efímeras ondas aparecen. Y así, el Támesis, en la plácida tarde, sostiene sin descanso la esperanza.

Journey into the language and culture of the Spanish-speaking world, a world of 300 million people that spans 20 countries, three continents, and numerous islands.

Learn all about Major League Soccer. Discover fascinating facts, from record-breaking stars to winning teams and important positions.

We are a nation of immigrants. Even many of the faces we see on TV and in the news are recent immigrants. Meet these new Americans and learn their stories, whether they are athletes, musicians, artists, politicians, or businesspeople. Discover how all immigrants, along with natural-born American citizens, form a mosaic of different cultures and traditions. Written in standard Latin American Spanish.