Frederick Douglass: Líder del movimiento abolicionista (Frederick Douglass)

Readers won't have to disassemble their favorite toys to discover what makes them work. This book explores electric, magnetic, and motion-powered toys from design to function. It introduces readers to the six simple machines and explains how they use force and motion to do work. Not every toy is a technological marvel. Readers learn about time-honored favorites including the rocking horse, Slinky, and rattles.

Though few may know his name, his achievement as the first European to discover San Diego Bay and many other areas on the California coast enshrines his name in the annals of American history. This exciting volume tells Cabrillo's story from an unknown soldier to the intrepid conquistador, crossbowman, landowner, shipbuilder, and explorer he became. As one of Hernan Cortes' soldiers during the conquest of Mexico and a founder of Guatemala, his actions loomed large in the future of both South America and North America. By both educating and entertaining, this biography illuminates a...

Immigrants help make the United States a special place. Learn all about the history of immigration to the United States as you sharpen your data measurement skills! This Spanish math book seamlessly integrates the teaching of math and reading, and uses real-world examples to teach math concepts. Text features include images, a glossary, an index, captions, and a table of contents to build students' vocabulary and reading comprehension skills as they interact with the text. The rigorous practice problems, sidebars, and math diagrams extend the learning experience and provide multiple...

¿Por qué se lamentan los cuervos de Morrigan? ¡Solo los británicos con corazones que aman la verdadera libertad lo saben! En el año 43 d.C., la conquista romana de Britania parece inminente, hasta que un encuentro casual entre Prasutago, rey de los icenos y una esclava fugitiva de linaje real de la tribu hedua en la Galia cambia el destino de las islas británicas para siempre. ¡Sublévese por la libertad con la verdadera historia de Boudicca, la reina britana de los icenos y descubra una de las historias más inspiradoras jamás escrita! Basada en los relatos del historiador romano...