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

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,...

¿Cómo pueden tener el mismo sueño cuatro personas? ¿Por qué iban a suicidarse después de soñarlo? John Verdon, la gran sensación del thriller a escala internacional, ha vuelto con un nuevo libro que recordará a sus seguidores el ritmo cinematográfico de su escalofriante novela debut Sé lo que estás pensando .Cuatro personas que no se han visto nunca, que viven en distintas partes del país y que no parecen tener nada en común explican que han tenido el mismo sueño: una pesadilla recurrente cuyo elemento más inquietante es un cuchillo ensangrentado con la cabeza tallada de un...

Recounts the life of Cuban violinist Claudio José Domingo Brindis de Salas, a black child who was born free and began his career as a musical prodigy to become a noted concert musician in Paris, while slavery still existed on the island.

Through bright images, charts and graphs, and Spanish-translated informational text, this book provides readers with enlightening facts about what it takes to work in this exciting and unique profession. Featuring a glossary of terms, an index, a list of helpful websites, and an interview with a real-life deep sea fisher, this text will engage children from cover to cover!