Serpientes y escaleras

Un anciano aparece muerto en un granja de la provincia de Lleida, y en un principio todo apunta a que ha sido asesinado. Junto a él se descubren una serie de documentos que permiten sospechar que, en el pasado, la víctima pudo estar relacionada con un agente de la Stasi, la temida policía estatal de la República Democrática Alemana.

Immigrants help make the United States a special place. Learn all about the history of immigration to the United States as you sharpen your data measurement skills! This Spanish math book seamlessly integrates the teaching of math and reading, and uses real-world examples to teach math concepts. Text features include images, a glossary, an index, captions, and a table of contents to build students' vocabulary and reading comprehension skills as they interact with the text. The rigorous practice problems, sidebars, and math diagrams extend the learning experience and provide multiple...

A simple biography of the naturalist who founded the Sierra Club and was influential in establishing the national park system.

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 historical events. This primary source book focuses on the history of California’s Native American tribes: the Tongva, Yokuts, Yana, and Yahi. 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 their grade level. Packed with...