La historia de los sistemas numéricos: Valor posicional (The History of Number Systems: Place Value)

Children learn about the features of Tyrannosaurus Rex, what Tyrannosaurus Rex ate, and how it attacked other dinosaurs.

Read Along or Enhanced eBook: Welcome to Canada! From its majestic mountains to its exciting sports, readers are invited to explore what makes Canada so special in this exciting, Spanish-translated nonfiction title! With informational text, fresh vocabulary, and engaging maps, readers will be engaged from beginning to end.

UNA HISTORIETA PENSADA PARA LOS MÁS CHICOS QUE RETRATA, CON HUMOR E INGENIO, QUÉ ENTRETENIDA RESULTA LA VIDA DE FACU CON UNA MASCOTA TAN ESPECIAL.

While the Great Depression was indisputably a difficult period in American history, it did lead to certain developments that we still benefit from today. One for the most significant examples of this is Social Security, which helps a whole generation of retired Americans. The book offers a concise description of the Great Depression, including analysis of its causes and its effects. Chapters focus on different aspects of the period, including culture, the arts, and science and technology. The dynamic design displays images of posters and experiences from the Depression era. This informative,...