Public Schools Charter Schools Private Schools Colleges The Humboldt Unified School District #22 (H.U.S.D.) serves the communities of Prescott Valley, Humboldt, and Dewey, and includes 6 elementary schools, 2 middle schools and 1 high school. Their district offices are at 12150 Turquoise Circle in Dewey, and they may be reached by phone at: 928-772-9200. Chino Valley Unified School District has one elementary school, one middle school, and one high school. They are located at 115 N. Hwy. 89 in Chino Valley and may be reached by phone at: 928-636-2458.