El Pacto Del Mayflower /

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

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.

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

Diecisiete descubrimientos asombrosos que fueron claves y que marcaron el rumbo de nuestra historia. La mayoría de los hallazgos arqueológicos ocurren después de meses o años de investigación minuciosa y trabajo meticuloso..., pero a veces solo hay que estar en el lugar correcto en el momento adecuado para descubrir algo asombroso, ¡por casualidad! Este libro es una aventura en la que reviviremos algunos de los descubrimientos más sorprendentes y extraordinarios con los que se toparon personas normales y corrientes de distintas partes del mundo. Desde el hallazgo de Herculano a...

Learn more about the renowned British scientist, professor, and author who spent his entire career trying to answer the question: "Where did the universe come from?" Stephen Hawking was born exactly three hundred years after the death of the scientist Galileo, so maybe it was written in the stars that he would become a famous scientist in his own right. Although he was diagnosed with a neurological disease at age 21, Stephen did not let the illness define his life. Known for his groundbreaking work in physics, and identified by his wheelchair and computerized voice system, Stephen continued...

How does a liquid become a gas? Through evaporation! Evaporation helps make puddles disappear after it rains. In this Spanish-translated book, learn all about evaporation and how it happens. This 6-Pack includes six copies of this title and a lesson plan.

En esta, su segunda obra, Rosario Aguilera Mendoza cuenta la historia de Saul, un joven no querido por su madre, por ser el fruto de una violacion, y de su medio-hermana Chayito, quien tambien tiene que padecer el maltrato fisico y psiquico de una madre infeliz, resentida e ignorante. "Sabemos que hay un Dios que nos da la vida y que solo el nos la quita. Por eso, como padres, debemos vivir una vida feliz al lado de nuestros hijos, no dejarlos jamas en la calle, sino darles una buena educacion. No debemos gritarles, sino hablarles con respeto y carino porque cuando se les habla, ellos...