La Mesa-Spring Valley School District is a public school district in the East County area of San Diego County, California, United States. The district serves the city of La Mesa, a portion of the city of El Cajon, the unincorporated communities of Casa de Oro, Mount Helix, and Spring Valley. As of 2013, the district serves 12,587 students in grades K-8. There are four middle schools (grades 7-8) and 17 elementary schools (K-6). The district is run by a five-member elected school board.