La vida de Sacagawea (The Life of Sacagawea)

El romancero ha sido durante siglos vehículo de transmisión viva y directa de multitud de temas populares. Grandes poetas han utilizado el romance entre sus formas de expresión, por su musicalidad y su implantación popular.

Sesenta autores, desde catedráticos de universidad hasta estudiantes de Secundaria y Bachillerato, nos presentan los cuarenta desafíos que la Real Sociedad Matemática Española propuso con motivo de su centenario.Son cuarenta estimulantes retos que avivan el ingenio. Enfrentándose a ellos, el lector se sentirá un auténtico investigador matemático.Pero no hay que asustarse. No es necesario saber muchas matemáticas. La herramienta esencial para resolver los desafíos es pensar ordenadamente.

Blue is a beautiful color, and it's all around us, as this volume demonstrates. Readers are presented with multiple vivid hues of the color blue through recognizable objects, such as flowers, fish, and blueberries. They'll also be able to practice their vocabulary while reading comprehensible sentences. They can demonstrate their understanding of the color concept by completing the activity at the end of this book.

With a direct tone and based on testimony, questions, real emotions, and inquiries, this book advises adolescent young men on several different topics: muscles, sports, women, acne, humor, the Internet, music, jokes, money, risks, and protection, among others. A book filled with information, practical ideas, modern tips, and illustrations, it has the added benefit of being endorsed by professionals specializing in each of the subjects it covers. Con un tono directo y sin prejuicio, este libro surge de testimonios, preguntas, emociones e inquietudes reales, intentando orientar y dar respuesta...