El ciclo del nitrógeno (The Nitrogen Cycle)

How do you truly engage students in learning history? When students make personal connections to the subject, they're much more motivated to learn. This Spanish book provides firsthand accounts of history that give personal insights into what life was like during Westward Expansion. Students will learn about the reasons people headed west, the gold rush, the Homestead Act, Manifest Destiny, the Oregon Trail, and more. With a visually appealing layout, this book features captivating text, fun facts, sidebars, and time lines that help students grasp the essential concepts they need to know at...

In Bosques, carefully leveled text and vibrant, full-color photographs take beginning readers on a tour of a temperate forest. Readers learn about this important ecosystem and the variety of living things adapted to live there.

Este libro no es prosa. No es normal ni pretende serlo. No es ficción ni llegará jamás a ser poesía. Porque no quiero llevar el peso de ser poeta a mis espaldas, si no puedo a veces siquiera llevar el de ser un referente para algunos, ya que en ocasiones disto bastante de ser perfecto. Hoy, si acercas un poco algunas páginas a tu oído, quizás consigas escuchar mi corazón. Y si en ocasiones no lo oyes, es porque está algo roto. No te prometo que este sea el mejor libro que hayas leído nunca, porque a mí me lo han prometido en demasiadas ocasiones con muchos que he vuelto a dejar en...

Readers may never expect that they might free fall to Earth, but if they have ever dived into a pool, that's exactly what they've done. This Spanish-translated book shows readers how Newton's three laws of motion affect divers, skydivers, and mountain climbers' movements. Readers discover who uses gravity, who works against it, and all other forces that contribute to a successful dive or climb. After reading this Spanish-translated book, readers can decide if they will ever be interested in engaging in one of these extreme sports.