Los alimentos

Alexander Graham Bell was always trying to invent new things! In this biography that has been translated into Spanish, readers will learn about Alexander's life as a teacher and inventor of such incredible inventions as the telephone, record player, and metal detector. Colorful images, supportive text, an interesting timeline, and a helpful glossary, table of contents, and index combine to give readers an inspiring look into the life of Alexander Bell.

"Wee-ooo! Wee-ooo! Fire Trucks are here to help! Learn how and where they do their work in this Machines! song. Includes glossary, critical thinking questions, and sheet music"--

For many years, people believed there were nine planets that orbited the sun. Now we say there are eight. What happened to the ninth planet, Pluto? What are the different planets like? What exactly makes a planet a planet? These are the many intriguing questions answered with this high-interest book, crafted to be accessible for readers of all levels. Young astronomers will be especially fascinated by the stunning photographs and the "Make the Grade" fact boxes.

Un libro para propiciar el pensamiento y estimular el diálogo sobre los temas fundamentales. Desde muy pequeños aprendemos que las ideas se oponen y comprenden una gracias a la otra: la oscuridad sólo se entiende en oposición a la luz, la alegría a través de la tristeza, el frío por el calor... Luego, nuestro pensamiento se vuelve más sutil y nos permite comprender nociones más abstractas. Pero siempre continúa necesitando a los contrarios para progresar y ayudarnos a comprender la realidad y a nosotros mismos. Este libro propone al joven lector (y también a los mayores) una forma...