La naturaleza de la materia (The Nature of Matter)

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.

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.

Fue amor a primera vista. Un relámpago que me reveló sentimientos nuevos y palpitantes, como esa luz que sólo había leído en libros de poesía. Sin darme cuenta, poco a poco entré en un laberinto de emociones que me perdió en ella y me enfrentó conmigo. Fueron días interminables en los que aprendí a nombrar mi deseo y mi frustración. Tantas derrotas. Comencé a escribir. Y todo, absolutamente todo esfuerzo por amar y ser amado me parecía inútil. —R. N.

Mars is perhaps the most thrilling planet these days. With rovers exploring its surface and manned missions in the works, people are wondering if Mars is our next home! In this highinterest book, readers will learn more about Earth's neighbor, including what its climate and surface are like, why it's called the Red Planet, and about the recent discovery of water on its surface. They'll learn all this while solving "Your Mission" math problems that complement and support the text. This motivating volume is an engaging way to explore key aspects of science and math curricula.

Método para la enseñanza del español como lengua extranjera orientado al mundo del trabajo. Libro del alumno, con resumen gramatical, transcripciones y CD Audio incluidos. Nivel intermedio (B1).

Who were the earliest Americans? When, how, and from where did they enter and spread across the continent? And what is their relationship to modern Native Americans? Anthropologists develop theories to answer these questions based on the evidence they discover. Their theories—and the discoveries that prove and disprove them—are highlighted in this fascinating volume, full of awe-inspiring facts and incredible breakthroughs. Readers will feel like anthropologists and archaeologists themselves as they read about bones and artifacts, and what they reveal about the ancient cultures that roamed...