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.

When Edward goes to school for the first time, he isn't quite ready to join in with the other children. The author delights us once again with her warmth and humor.

¡Salta! Sigue a un cachorrito durante todo el día para aprender la rutina de estos perros jóvenes. Usando herramientas como el árbol de vocabulario y las actividades de comprensión, los niños aprenden vocabulario en grupos de conceptos—lo cual les ayuda a hacer conexiones entre las palabras y ampliar su conocimiento del mundo.

The United States grew rapidly from the time of the Louisiana Purchase to the building of the Transcontinental Railroad. All of this expansion came at the expense of Native American populations that had either lived in the region for centuries or been forced there from ancestral homes in the East. Tribes memorably fought on their own and together in an doomed effort to retain the land and a lifestyle that had long sustained their families. This book outlines some of the major conflicts of the Westward Expansion, and of the treaties and were signed, and often broken, by representatives of the...

Defines pulleys, explains their functions, and suggests simple experiments to demonstrate how they work.