El Pacto Del Mayflower /

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

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.

�Cu�les son algunas de las cosas que nosotros podemos aprender sobre los animales tomando en cuenta la forma de sus bocas o picos? �Qu� podemos deducir sobre los animales con dientes filosos comparados con los que tienen dientes largos y planos? �Existen algunos animales sin bocas? En esta secuela sobre las series de Adaptaciones de animales, la galardonada fot�grafa y educadora naturalista Mary Holland comparte las fascinantes bocas de los animales con los lectores de todas las edades.

¿Por qué tienes que guardar turno en los columpios?. Descubre cómo los buenos modales hacen del parque un lugar seguro y divertido para todos.

When Nina, Maricela, and Alejandro decide to help some homeless people living near their school in Los Angeles, the issue of homelessness becomes personal when they discover that it is affecting a friend. With help from their 5th grade teacher, they decide to take action and help those in need. This 32-page realistic fiction book features full-color illustrations, diverse characters, and a short chapter format. Capture the interest of reluctant and struggling readers with hi-lo text.

What does swimming in a pool, drinking through a straw, breathing in air, and circulating blood all have in common? They all require a form of air or water pressure! Readers will discover the variety of ways that air and water pressure make an impact on our lives and the things in them. This fact-filled, Spanish-translated nonfiction title includes real-life examples and basic experiments to aid in the development of understanding physic and scientific concepts. Readers will be introduced to and learn about Archimedes Principle, atmospheric pressure, vacuums, water density, and hydraulics...