La Energía Solar (Solar Energy)

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.

You re growing up and your body is changing. If you re a girl, you re likely experiencing the start of menstruation, your breasts are making themselves known, and you re noticing new hair that you might want to be rid of. If you re a boy, you may be experiencing something strange as you sleep, or sweating a lot and not wanting to shower. This book is a complete guide to the terrible and marvelous world of puberty."

Este libro trata de atender a las necesidades reales de los profesores de matemáticas de Educación Secundaria Obligatoria ofreciéndoles una síntesis práctica de problemas, estrategias y teoría, mediante una presentación funcional para su utilización in mediata en la clase. Proporciona un plan detallado de cada Unidad (material complementario para el profesor y hojas reproducibles para los estudiantes) para cuarenta sesiones de trabajo. Las unidades están diseñadas para enseñar importantes destrezas y estrategias de resolución de problemas. La metodología de enseñanza introduce a ...

Celebrating the life, growth, and development of baby animals, Starting Out narrates the tale of growing up in the wild. This series--now in Spanish as well as English--employs simple language and a unique first-person perspective to introduce foundational biological concepts as it follows the adorable animal through the start of its young life. The straightforward text and large photos of the animal in its natural environment will both entertain and enlighten as readers learn how the animal's physical features, diet, habitat, and familial relationships play a role in its growth and...

Latin America’s population is estimated to be well over half a billion people, almost one-tenth of the world’s population, living in thirty-three different countries and territories. This engrossing book explores the people of South America, Central America, Mexico, and the West Indies and provides extensive detail on their diverse cultures. An authoritative overview of the varied and rich traditions of each of these regions is presented, as well as a thorough discussion of the religions, languages, and ethnicities of Latin Americans.