Valles Caldera Valles Caldera dates back to the prehistoric times: spear points dating to 11,000 years ago have been discovered. Several Native American tribes frequented the caldera, often seasonally for hunting and for obsidian, used for spear and arrow points. Obsidian from the caldera was traded by tribes across much of the Southwest. Eventually, Spanish and later Mexican settlers as well as the Navajo and other tribes came to the caldera seasonally for grazing with periodic clashes and raids. Later as the United States acquired New Mexico as part of the Treaty of Guadalupe Hidalgo in 1848, the caldera became the backdrop
Guadalupe Guerrero Guadalupe Guerrero Guadalupe Guerrero is the Superintendent of Portland Public Schools in Oregon. In 1992, Guerrero earned a BA degree in History at UCLA. He later earned two master's degrees from Harvard University, one in School Leadership and Principal Certification and one in Educational Policy and Management. Guerrero's first position was as a bilingual elementary school teacher in San Francisco. He was principal of Dever Elementary in Dorchester, Boston from 2002 until 2008, a school the Boston Post described as a "school in crisis" in 2002. While principal, he introduced a new math curriculum, and increased outreach to parents. However,