Desafíos matemáticos

What is matter and where can it be found? Everything in the world is made of matter, whether it is a solid, a liquid, or a gas. Important ideas about matter such as volume, mass, and how matter changes state are conveyed through a series of easy-to-do experiments.

Like the other Sasek classics, these are facsimile editions of his original books. The brilliant, vibrant illustrations have been meticulously preserved, remaining true to his vision more than forty years later and, where applicable, facts have been updated for the twenty-first century, appearing on a "This is . . . Today" page at the back of each book. The stylish, charming illustrations, coupled with Sasek’s witty, playful narrative, make these books a perfect souvenir that will delight both children and their parents, many of whom will remember them from their own childhood. In This is...

In an online world where the amount of information seems to increase exponentially even week to week, student researchers can find it an ever-greater challenge to distinguish credible, vetted content from hearsay and misinformation. This book on citing internet sources will help them determine which online sources are trustworthy and which are not. Its lively and engaging instructional tips will help readers successfully negotiate the vast landscape of information out there. They will produce quality research for papers now and beyond in their academic careers with skill and confidence.

La vida de 75 chilenas rebeldes que se han decidido a cambiar la historia ¿Sabes qué tienen en común la actriz Daniela Vega y la revolucionaria Javiera Carrera? ¿La escritora Isabel Allende y la nadadora Kristel Köbrich? ¿La escultora Lily Garafulic y la presidenta Michelle Bachelet? Sí: todas ellas son chilenas. Todas ellas han cambiado nuestra historia. Todas ellas dejaron su huella persiguiendo un sueño. Y ahora te invitan a atrapar el tuyo. Un libro para crecer, inspirarse, aprender y recordar que, pese a la adversidad, lo último que puede hacer una mujer es bajar los brazos.