El cáliz negro

Sangre de reyes es la fascinante continuación de una de las mejores novelas históricas de los últimos años. Los hijos del Grial, Roç y Yeza, descendientes directos de Jesucristo según los eruditos de la época, prosiguen sus andanzas por la cristiandad medieval. En esta ocasión, las peripecias de nuestros héroes, ahora adolescentes, tienen como telón de fondo una de las mayores gestas de la época: la cruzada de Luis IX, cuyo objetivo es rescatar de la herejía a la ciudad de Jerusalén.

Todos los años, grandes y pequeños animales se ven obligados a migrar para sobrevivir. Tanto en el mar como en la tierra, estos animales enfrentan obstáculos y fuerzas naturales para poder reproducirse, alimentarse y mantener a su especie fuerte para futuras generaciones. Este libro es una introducción a las travesías peligrosas de la zebra, de la morsa y del cangrejo rojo de la Isla de Navidad, quienes luchan contra chitas hambrientas, locas hormigas amarillas y hasta contra su propia especie para poder completar la travesía de su vida. National Geographic apoya a los educadores K-12...

Born into slavery, Frederick Douglass relied on his own determination and ingenuity to carve a path to freedom. Once free, he dedicated his life to improving the lives of others and fighting for justice and equality. This inspirational Spanish biography uses primary sources to engage students in learning about the fascinating life of Frederick Douglass. Students will build their literacy skills as they are immersed in social studies content. Text features include a glossary and an index to increase comprehension and academic vocabulary.

The sun is responsible for all life on Earth, but what exactly is it? Our star is an amazing force that can be as dangerous as it is important. From solar flares to the threat of blowing up altogether, the sun is one of the most interesting things in our solar system. Readers take a trip to the sun to see how it works and exactly what it is made of. They’ll learn about the life cycle of a star and see just how long we have until we have to find a new planet to call home. Don’t worry, they’ll be happy to learn that (hopefully) we have millions of years left!

This Spanish-language series presents the complete range of math concepts and skills students are expected to master during the first grade. The series moves sequentially, from easiest to hardest concepts, with each book covering a different math topic. The first volume reviews the math concepts students learned in kindergarten. The next six books cover counting, adding and subtracting, tables and graphs, money, patterns, and measuring. The eighth volume is a summary of the math concepts students have studied throughout the year. Each book presents situations that show the relevance of math...