Desafíos matemáticos

Visiting Tulum National Park is like going back in time. The Maya lived there long ago. Learn addition as you count the things they left behind. This Spanish math book combines math and reading skills and uses real-life examples of problem solving to teach subject-area content. The dynamic images, detailed sidebars, practice problems, and math diagrams make learning addition easy and fun. Text features include a table of contents, a glossary, an index, and captions to build vocabulary and increase understanding of math and reading concepts. An in-depth problem-solving section provides...

Ayudar a un niño a que asimile acontecimientos dolorosos o felices, inesperados o inevitables, a que acepte sus limitaciones y cualidades, a que adquiera hábitos y actitudes, es una tarea que puede resultar ardua y, en ocasiones, muy difícil de llevar a cabo. Este libro, que su autor define como una extensa guía de lectura, se ofrece como herramienta para encontrar un espacio en el que el entendimiento entre un adulto y un niño sea posible. Es un libro que favorece el disfrute compartido del gran festín que es la vida a través de los exquisitos sabores de la literatura.

Over the years, people have looked for ways to improve our imperfect sight. This has led us to the world of optics, which is the study of light and how it travels. What are some of these innovations that have changed how we see the world, and how do they work? Find the answers to these questions with this Smithsonian Informational Text! Created in collaboration with the Smithsonian Institution, this text builds students' reading skills while engaging their curiosity about STEAM topics through real-world examples. It features a hands-on STEAM challenge that guides students through every step...

When the Louisiana Territory was added to the United States in 1803, it about doubled the size of the young nation. It took years to clarify its boundaries and explore every square mile. How this momentous purchase came to be and its implications on the future of the United States are explained in detail in this book. Uncomplicated maps and simple language help developing readers and those in need of review to understand the many changes in this land that started with its purchase in 1803.