Rio Seco School on Santee's Cuyamaca Street corridor serves 920 students in grades K through 8 within the Santee School District, making it one of the district's largest campuses. The school's health screening protocols direct families to nearby pediatric providers including Children's Primary Care Medical Group Santee on Cuyamaca Street for required immunization records and wellness checks. Rio Seco opened in 1980 and operates on the secondary commercial corridor where Cuyamaca Street anchors auto, medical, and commercial services for the broader East County San Diego community. The campus houses both elementary and middle school grade bands under one roof, allowing K-8 continuity before students feed into Grossmont Union High School District. After-school programming extends to youth organizations such as Boys & Girls Clubs of East County - Santee Clubhouse on Tamberly Way. State assessment data shows 55 percent math proficiency and 61 percent reading proficiency, both above California statewide averages, at a 24-to-1 student-teacher ratio across 39 full-time-equivalent teaching positions.