La naturaleza de la materia (The Nature of Matter)

Introduce students to immigration in America in the 1800s, and how it affected the United States. With this Spanish-translated book, readers will discover topics such as Ellis Island, Angel Island, and assimilation. Primary source images, fascinating facts, a glossary, and other features keep students engaged and help them better understand the social studies content.

Read Along or Enhanced eBook: Take a journey into the wild world of reptiles and amphibians! Readers will learn about crocodiles, lizards, snakes, tortoises, and salamanders. Featuring a glossary, index, colorful images and charts, intriguing facts, and clear, informative text, readers will be sure to be enthralled as they move through this engaging, Spanish-translated book.

En las palabras quirúrgicas que Cristóbal Pera tan magistralmente define, describe, analiza y valora, nos adentramos por un territorio nuevo, por una cálida geografía donde se enraíza todo conocimiento y todo saber. Por eso, la lectura de tan luminoso libro es una continua incitación al pensamiento-por algo brota del originario saber de las manos-, a la reflexión sobre la vida y la muerte, sobre el dolor y la felicidad, sobre la angustia y la esperanza. Emilio Lledó

Pets! We love them, and we take good care of them. Learn all about what Fish need to be happy and healthy pets. ¡Las mascotas! Las amamos y las cuidamos mucho. Aprende todo sobre qué necesitan los Peces para estar felices y ser mascotas saludables.

This book is a comprehensive, practical presentation of the principles of behavior modification and guidelines for their application. It teaches forms of behavior modification ranging from helping children learn necessary life skills to training pets, to solving personal behavior problems.

Este libro ilustrado para nianos y jaovenes nos lleva a un viaje a travaes del tiempo para descubrir algunas de las estructuras maas asombrosas que la humanidad ha construido a lo largo de su historia.