Desafíos matemáticos

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.

This book is a comprehensive, practical presentation of the principles of behavior modification and guidelines for their application. It teaches forms of behavior modification ranging from helping children learn necessary life skills to training pets, to solving personal behavior problems.

★“Fascinating...An appealing resource sure to spark an interest in biomimicry, from casual readers to budding scientists. Recommended for all libraries.”—School Library Journal, starred review Did you know that lamps can be powered by glowing bacteria instead of electricity? That gloves designed like gecko feet let people climb straight up glass walls? Or that kids are finding ways to make compostable plastic out of banana peels? Biomimicry, the scientific term for when we learn from and copy nature, is a revolutionary way to look to nature for answers to environmental problems such...

Explore our solar system and Earth's place in it as readers flip through the pages of this Spanish-translated nonfiction title. Featuring vibrant images in conjunction with accessible charts and diagrams, readers will be fascinated from cover to cover!

Discover what it takes to be an Emergency Room doctor in this enlightening, Spanish-translated nonfiction title. Readers learn about the hard work and dedication it takes to have a career as an ER doctor and what a typical day is like in the emergency room. From medical school to residency, medical symptoms to diagnosis, children will learn all about the steps it takes to get involved in this profession. This engaging title features vivid photos, helpful charts and diagrams, informational text, a glossary of terms, and an interview with a real-life ER doctor to delight, inform, and encourage...