Cómo funcionan los ecosistemas

Un joven escritor que lava platos en las mazmorras de un restaurante oriental evoca las voces de sus amigos y de sus numerosas mujeres en un vertiginoso testimonio de lenguas y pieles africanas, orientales, latinas y también francesas. Pocas veces una obra de ficción ha palpado con tanto dramatismo, tensión y belleza el mundo de los inmigrantes. El síndrome de Ulises, como se llama a las pesadumbres de los inmigrantes en la soledad de un país desconocido, a las que se incuban en los guetos donde se hacinan los extranjeros ilegales, es una novela más cercana al París desaforado y...

Combine valuable fifth grade math and literacy skills in a purposeful way with the Spanish-translated math reader El regalo de cumpleaños del abuelo (Grandpa's Birthday Present). Focusing on the critical skills that 5th graders need to know to advance to the next level, this book incorporates key concepts into an engaging text that showcases math skills needed to create a budget and calculate sale prices. This high-interest nonfiction reader introduces how to convert percentages, decimals, and fractions. Filled with mathematical charts, diagrams, and practice problems, the text features in...

Muddy Creek in Edgewater, Maryland is the site of a major makeover. The land around the stream has worn down. Find out what caused Muddy Creek to erode, and the many steps involved in saving it. Created in collaboration with the Smithsonian Institution, this Smithsonian Informational Text builds students' reading skills while engaging their curiosity about STEAM topics through real-world examples. It features a hands-on STEAM challenge that guides students through every step of the engineering design process, from the initial research and brainstorming sessions, through the design and testing ...

Based on the #1 New York Times Best-Selling series, this timeline of world history gives a fresh take on global events, from King Tut to Malala Yousafzai. Basada en la serie más vendida del New York Times, esta cronología de la historia mundial ofrece una nueva visión de los acontecimientos mundiales, desde el rey Tutankamón hasta Malala Yousafzai. For the first time ever, the Who Was? subjects are gathered into a single title! The Who Was? History of the World is a journey along the timeline of history, noting the birthdays of 150 people in the series and what was happening in the world...