La naturaleza de la materia (The Nature of Matter)

Did you know that most animals in the world don't have backbones? Learn more about invertebrates in this engaging, Spanish-translated nonfiction book. Readers will learn all about mollusks, arthropods, arachnids, and crustaceans while being stimulated from cover to cover with its detailed images and charts, intriguing facts, and informative text.

A force is a push, a pull, or a turn. Every force has an equal and opposite force. Forces are always with you! They are all around us. Learn about forces with this Spanish science reader that features easy-to-read text. Nonfiction text features include a glossary, index, and detailed images to facilitate close reading and help students connect back to the text. Aligned to state and national standards, the book also includes a fun and engaging science experiment to develop critical thinking and help students practice what they have learned.

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.

In this biographical book, young readers will learn about the brave life of Harriet Tubman. Readers will discover how Tubman bravely escaped from her life as a slave to cross the Mason-Dixon line into freedom and how she helped hundreds of other slaves into freedom through the Underground Railroad with the help of abolitionists. The vivid images, stunning facts, and supportive text work in conjunction with the helpful glossary, index, and timeline of Tubman's life to give readers an engaging experience as they move from cover to cover. This book has been translated into Spanish.

Una novela histórica para entender las causas y las consecuencias de la Revolución francesa. María Antonieta, princesa de Austria, llega al palacio de Versalles con tan solo catorce años para casarse con el futuro rey de Francia. Esta unión servirá para que Francia y Austria neutralicen el ascenso de la vecina Prusia y la expansión de Inglaterra. Mientras tanto, Batián y Lucile, de clase social baja, luchan cada día para sobrevivir con escasos recursos en el París del siglo XVIII de grandes desigualdades sociales. La Revolución francesa se está fraguando y el Antiguo Régimen...

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...

¿Chocolate o vainilla? ¿Dulce o salado? ¿Gatos o perros? Cuando de ciertos temas se trata, todo niño tiene sus preferencias. Desde que existen las mascotas, el debate entre tener un gato y tener un perro ha sonado fuerte durante los recreos y almuerzos en todos los colegios del mundo. ¿Cuál es mejor? ¿Cuál es más inteligente? Este libro presenta los hechos de manera divertida e informativa. A los niños les encantará leer este texto de Nivel 3 para decidir cuál es la respuesta a la pregunta eterna - ¿gatos o perros? NationalGeographic apoya a los educadores K-12 con Recursos del...

¿Qué hay de real en las reliquias de Indiana Jones?, ¿existe el auténtico Santo Grial?, ¿estaban realmente los nazis vinculados al ocultismo?, ¿qué es el Ojo del Pavo Real?, ¿qué misterios entraña la Calavera de Cristal?, ¿los agentes soviéticos utilizaron la parapsicología?, ¿es la disciplina arqueológica tal y como se muestra en los filmes? Por fin, aquí tenemos las respuestas a éstas y otras muchas cuestiones sobre los artefactos de Indiana Jones. Este breve ensayo rastrea en todo lo que usted necesita saber sobre la verdad histórica, cultural y técnica que se esconde...