La luz y sus efectos (Light and Its Effects)

So you think you're a martial arts master, but do you know the difference between kung fu, kendo, and karate? Students will learn about various martial arts as they practice comparing numbers. This nonfiction math book combines math and literacy skills, and uses real-life examples of problem solving to teach subject area content. The full-color images, intriguing sidebars, practice problems, and math diagrams make learning math relevant and fun. Text features include a table of contents, glossary, and index to increase understanding of math and reading concepts. An in-depth problem-solving...

Explains, in simple terms, the reasons for skin color, how it is determined by heredity, and how various environmental factors affect it.

Diego Valverde Villena (Lima, 1967). Magíster en Literatura Inglesa y licenciado en Filología Hispánica, Filología Inglesa y Filología Alemana. Ha realizado estudios de doctorado en las universidades de Oxford, Heidelberg, Tubinga, Chicago y Complutense de Madrid. Profesor de literatura en la Universidad Mayor de San Andrés y profesor visitante en universidades europeas y americanas. Sus ensayos recorren la literatura universal, con especial dedicación a la literatura hispanoamericana. Sobre Álvaro Mutis ha publicado Varado entre murallas y gaviotas. Seis entradas en la bitácora de...

Describes the U.S. Army Rangers, including their missions, vehicles, weapons, equipment, and duties. Written in English and Spanish.