SDA Theatre in Encinitas is the performing-arts department of San Dieguito Academy, staging full-scale musicals, plays, and student-directed one-acts in the Clayton E. Liggett Theater at 800 Santa Fe Drive. The International Thespian Society chapter trains student actors and technical crews in blocking, vocal projection, scenic construction, and stage management, developing the same multidisciplinary performance skills taught at Stage Door Dance on Rancho Santa Fe Road. Technical facilities include a dedicated sound booth, a costume design and construction room, a scenic carpentry shop for flat and platform fabrication, and an overhead lighting catwalk for focus and gel placement. The Theatre Arts Council, a parent-led support organization operating under the SDA Foundation's 501(c)(3) umbrella, funds visiting vocal coaches, choreographers, and sound engineers to supplement in-house instruction. Pit orchestra instrumentation for musical productions draws from the broader Encinitas music-education community, with rehearsal-grade instruments and sheet music sourced through retailers such as American Music Store on South Coast Highway 101. The Liggett Theater's highest-production-value shows deploy a 96-channel ETC dimming rack, Fresnel and ellipsoidal fixture arrays on three electric battens, and a 32-channel digital mixing console patched through a stage-box snake system for front-of-house and monitor feeds.