Louis Pasteur

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

Young students will be enthralled with compelling portraits of famous figures who devoted their lives to improving the world. Includes historical photos and illustrations.

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.

A través de textos y crónicas que juegan en la delicada línea entre lo completamente personal y aquello que es extrapolable a lo universal, Eduardo Halfon nos habla de la lectura, las bibliotecas y la escritura. Bajo esas temáticas podemos descubrir la genealogía familiar, los prejuicios de clase, y hasta breves anécdotas tan íntimas como intimidatorias. En un pequeño libro, un gran mundo.

Learn About The Destructive Effect Non-Native Animals Have On Native Plants And Animals When They Invade An Environment.

En este cuaderno estudiarás diversas palabras usuales que se escriben con x, con v y con h. Y, finalmente, estudiarás el uso de las mayúsculas en los nombres propios.

Describes the U.S. Navy's Blue Angels, including their planes, the formation and maneuvers of their air shows, and team member duties. Written in English and Spanish.