Manual para el Trabajo Social Comunitario

California became a territory in the United States when the Treaty of Guadalupe Hidalgo was signed in 1848. That treaty ended the Mexican War. Several days before its signing, gold was discovered at Sutter’s Mill in what is now Sacramento. The non-Native population of the territory was less than one thousand in 1848, but the gold rush increased that number to one hundred thousand by the end of 1849. The gold rush not only made many people wealthy, it brought ecologic devastation while speeding up California’s statehood. This book richly explores this interesting history.

Crawl into some learning fun by introducing young readers to animal classifications by explaining how arthropods are grouped. This nonfiction book explores the differences and similarities between several classes, families, genera, and species of arthropods, and how animal classification works—part of the Los animales también tienen clases series. Fun Children's Book Features: This Spanish science book includes a glossary, index, comprehension questions, and reading activity to encourage further learning and reading comprehension skills. 24 pages with vibrant photographs Guided reading...

A scientific look at the natural processes that create waterfalls, and where they are likely to form.

Did you know that gases have no size or shape? Gases can become liquids when they get cold. Discover more interesting facts in Gases, part of the States of Matter series of EYEDISCOVER books.