Criptología digital (Digital Cryptology)

¿Qué tipos de animales viven en la selva tropical? Entra a la jungla para aprender todo acerca de estas criaturas fascinantes.

Five and counting! So far, astronomers have discovered five dwarf planets in our solar system. Pluto, which was once thought of as the ninth planet, is today classified as a dwarf planet. This book looks at the current dwarf planets, characteristics, size, and orbital patterns, as well as the three rules scientists follow to characterize these tiny, round space objects. Every day new discoveries are being made. Who knows how many dwarf planets we will find in the future! This book will allow students to understand that patterns in the natural world can be observed, used to describe phenomena, ...

Take a trip to New Orleans with a young girl and her family as they attend one of the world's biggest parties: Mardi Gras! Learn all about the history of this fascinating festival as you practice subtraction strategies. This fiction math book combines math and literacy skills, and uses real-life examples of problem solving to teach subject area content. The full-color images, engaging sidebars, practice problems, and math diagrams make learning subtraction strategies relevant and fun. Text features include a table of contents, glossary, and index to increase understanding of math and reading...

What does masculinity or being a boy mean in this society? If you are a boy, or ever were, The Golden Book of Boys contains words and images that will help you remember how powerful you are, but powerful in a different way than you may have been told until now... It is a book against the tide. A strange book. A journey back to how wonderful you are. A book that invites you to respect yourself, to obey yourself and to be yourself (something that nobody usually tells us). Maybe it will help you to remember how wonderfully vulnerable you are and to heal old wounds.