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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.

(back cover) Hablemos de esto! A menudo, los ni os demasiado tmidos tienen preocupaciones y se sienten incomprendidos. ERES T?MIDO? ayuda a ni os y ni as a comprender que la timidez puede vencerse de muchas maneras. Ning n ni o debiera avergonzarse por ser tartamudo o por enrojecer cuando se le hace una pregunta. Todo lo que necesitan es aprender a enfrentar la situaci n adecuadamente. ERES T?MIDO? explica a los ni os que su timidez ir y(c)ndose poco a poco siempre que sigan tratando de expresarse ante los dem s."

Many people take the Internet for granted. But there are places that lack Internet access. Being connected helps people connect, and new ideas are being developed and tested to bring the Internet to more of the world. This Spanish nonfiction book will keep students engaged in reading about Internet access as they build their literacy, vocabulary, and comprehension skills. Important text features include a glossary, index, and table of contents. The Reader's Guide and culminating activity require students to connect back to the text as they develop their higher-order thinking skills. Check It...

Computer science is all around us, at school, at home, and in the community. This book gives readers the essential tools they need to understand the computer science concept of algorithms and procedures. Brilliant color photographs and accessible text will engage readers and allow them to connect deeply with the concept. The computer science topic is paired with an age-appropriate curricular topic to deepen readers' learning experience and show how algorithms and procedures work in the real world. In this book, readers learn how to use instructions to build their own drone. This nonfiction...