According to education rankings released by the U.S. Census Bureau, 40.4 percent of San Diegans ages 25 and older hold bachelor's degrees. The census ranks the city as the ninth smartest city in the United States based on these figures.
The San Diego Unified School District, also known as San Diego City Schools, is the school district that serves the majority of the city, it includes 113 elementary schools, 23 middle schools, 4 atypical schools, 10 alternative schools, 27 high schools and 25 charter schools. In the northern part of the city, Poway Unified School District and San Dieguito Union High School District are districts headquartered outside city limits, but serve several schools within city limits. In the southern part of the city, Sweetwater Union High School District serves multiple schools within city limits, although it is headquartered outside city limits.
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