Cómo funcionan los ecosistemas

Nature is not always kind. Natural disasters like earthquakes and storms can wipe out cities. Entire cultures and their histories are at risk of being lost. When disaster strikes, some people work to save cultural items. They preserve culture for the future! 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 and is perfect for...

In the third book in Andrea Camilleri's Montalbano series, the urbane and perceptive detective exposes a nest of corruption and international intrigue in a compelling new case. When an elderly man is stabbed to death in an elevator and a crewman on an Italian fishing boat is shot by a Tunisian patrol boat, only Montalbano suspects the link between the two incidents.

En su etapa de estudiante (finales del 1425 - comienzos del 1426), el humanista Antonio Beccadelli, el Panormita, compuso el Hermaphroditus, título que alude al contenido tanto heterosexual como homosexual de la obra. Es una obra poética de carácter festivo que toma como modelo a Marcial y a los Priapeos, en la que revela que sabía compaginar bien sus estudios con la diversión de la vida estudiantil. Beccadelli aspiraba a que su obra estuviera a la altura de estos modelos. Pero esto no valió para sus opositores. El papa Eugenio IV prohibió la lectura del Hermaphroditus y en varias...

This book looks at the numbers in Spanish. Main text on each page is provided only in Spanish, with simple, labeled photographs providing support. A "dictionary" spread at the end of the book features all the vocabulary words in both Spanish and English, and also includes a pronunciation guide.