La canción del coquí y otros cuentos de Puerto Rico

What’s the difference between a seal and a sea lion? These “second cousins” of the sea look similar, but there are many ways to tell these creatures apart. From ear shape to the noises they make to communicate, seals and sea lions are amazing creatures with both shared features and many truly unique attributes. They both share an ocean habitat, but when readers take a closer look, it’s easy to discover how they each fight off predators, mate, and raise their young in different ways. Captivating full-color photographs help to bring these marvelous mammals to vivid life.

Teach young students about ways to serve their communities. This Spanish-translated book encourages readers to help others and do their part in the community. Primary source images support the text and engage readers to help them better understand the content. Informational text features help students navigate the text.

Partiendo de una afirmación común es las ciencias (humanas y biológicas), el individuo tiene una estructura que pone en juego y moviliza la energía. Esta estructura está constituida por las palancas, las articulaciones y los músculos; pero sólo los músculos son los elementos sobre los cuales puede actuar directamente el entrenamiento. Cuando el músculo funciona produce la fuerza, que depende de su estiramiento. El libro, Los métodos modernos de musculación, se presenta divido en dos partes. La primera, que incluye las bases teóricas, trata: Los mecanismos de la fuerza -factores...

The nineteenth century was a time of huge growth and prosperity for California. Although the Gold Rush lasted only seven years, California provided other opportunities for those who emigrated there in search of a better life. This Interactiv-eBook focuses on the history of San Francisco, Los Angeles, Sacramento, and Fresno, and the people and events that influenced their transformations from small towns to booming cities. This nonfiction text builds literacy and social studies content knowledge through the use of intriguing primary source documents like maps, letters, images, articles, and...