[4] Campbell Union High School opened its doors as part of the district in 1900, with a registration of 35 students, consisting of 23 girls and 12 boys.

The first graduating class was one student, Charles Beardsley, who went on to Stanford University and became a lawyer, thus proving Campbell Union High School's academic merit.

[5] In 1938, the auditorium of the Campbell Union High School was built, with Work Projects Administration funds and the design of William H. Weeks.

Prospect, Westmont and Del Mar High School's attendance boundaries subsequently expanded to pick up the slack.

The rest of the Community Center holds classes, and portions are available to be rented for various purposes, including large meeting halls, office space, and outdoor facilities.