El petróleo

Read about the kinds of jobs that people do as engineers, and how they use math, science, and creative thinking to solve problems.

Una visión amplia y práctica del apasionante mundo del periodismo para los más jóvenes. ¿Quieres ser periodista? explica las habilidades y conocimientos necesarios para dedicarse a esta profesión, también describe cómo es el trabajo del día a día en la prensa, la radio, la televisión y los medios digitales, entre otros. Con anécdotas, reflexiones y opiniones de expertos en cada área y especialidad, los autores trazan un mapa claro y detallado de este oficio apasionante, sin dejar de lado las distintas aproximaciones y tratamientos que pueden o deben hacerse al transmitir la...

Many animals live in water, but only some can be defined as fish. Twenty-eight thousand species of fish exist, each with different characteristics. Readers from grades one through four will learn that fish have a distinct impact on their ecosystem and will see how fish survive when well-adapted to an uncompromised environment. Beautiful photographs demonstrate the great diversity of fish and accompany intellectually stimulating explanations of their varying roles and traits. From page to page, what a fish is unfolds in vocabulary call-outs, insightful questions, and relatable...

Teach students about the Declaration of Independence and the historical events that led up to it, with this Spanish-translated book. Readers will also learn what roles John Adams, Benjamin Franklin, and Thomas Jefferson played in the creation of the document. This book includes engaging images and text features to help readers better understand the vocabulary and social studies content.