City Tree Christian School in downtown San Diego's Bankers Hill district carries WASC accreditation at the highest six-year clear term — renewed in 1998, 2001, 2007, 2013, and 2019 — and has served infants through eighth grade from its Date Street campus since its 1976 founding as a preschool ministry of First Presbyterian Church. The ACSI-member curriculum integrates Bible-based instruction with California state academic standards across a 13-to-1 student-teacher ratio, a faith-and-academics model that feeds eighth-grade graduates into secondary pathways including San Diego High School on Park Boulevard. Elementary and middle school classrooms occupy the three-story Christian Education building on the First Presbyterian Church campus, using space that also serves Sunday School and youth ministry programming throughout the week. The infant and preschool wing anchors the lower end of the enrollment pipeline, giving families a single-campus trajectory from infant care through eighth-grade graduation — an age span distinct from the standalone preschool model at the Early Education Center at San Diego City College. Middle school coursework introduced in 2006 covers pre-algebra, earth science, and language arts composition at a depth intended to prepare graduates for high school honors tracks and competitive admissions.