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.

Depression is an unfortunately common mental health issue that many people don’t know how to address. In this straightforward, practical guide, readers will learn how they can identify and help a friend who is suffering from depression. Written in a compassionate tone, this guide separates out fact from fiction, providing an informative list of myths and facts to dispel common incorrect notions about depression as well as a thoughtful list of questions readers can ask their guidance counselor about a friend’s depression and seeking help. The result? Empowered readers who can lend a hand...

Now in Spanish -- make any moment mindful from morning to night with 5 categories of sturdy activity cards, designed to fit into each part of the day. Full-color illustrations, easy-to-follow instructions and an 8-page instruction booklet make this one-of-a-kind mindfulness deck an inclusive tool for nurturing inner peace and strength.

Surveys the life of the American statesman, lawmaker, writer of the Federalist Papers, and first secretary of treasury under George Washington.

Wildlife plays an important role in the environment. With the help of this engaging volume, readers of many ages and levels will learn all about many of the fascinating animals that inhabit the planet. They will find out what makes an animal an animal. They will also learn fun facts about some of their favorite creatures. Eye-catching photographs correlate closely with concise, accessible text that supports elementary life science curricula. A must-have for animal lovers, this informative book will be a popular addition to your collection.