Sierra School of San Diego in San Carlos provides individualized special education for students in grades 2 through 12 — ages six to twenty-one — at 6460 Boulder Lake Avenue in the 92119 ZIP. Operated by Specialized Education Services, Inc. (SESI), a division of FullBloom, the private day school serves 72 students across diagnoses that include autism spectrum disorders, emotional disabilities, learning disabilities, intellectual disabilities, and other health impairments. The student-to-teacher ratio runs 8 to 1, and each student receives instruction aligned to an Individualized Education Program (IEP) developed by a team of credentialed teachers, therapists, and behavioral specialists. The school formed in 2020 through the merger of Sierra Academy and Springall Academy, both previously co-located at the same Boulder Lake Avenue campus. Dyslexia Training Institute in San Carlos provides supplemental faculty development and diagnostic assessment services that support the broader special-education ecosystem in the 92119 corridor. Director Nicole co-created the ACT (Academic, Career and Transition) program in 2009 to bridge classroom learning with real-world job skills, and the school has participated in California's WorkAbility vocational program since 1997. San Carlos sits east of Lake Murray, and Boulder Lake Avenue runs through a light-commercial and residential pocket between Navajo Road and Mission Gorge Road. SESI's Integrated Multi-Tiered Systems of Support address academic, behavioral, and emotional needs simultaneously, and the school's stated goal is reentry — placing students back into their home-district public schools when the IEP team determines readiness. Extended School Year (ESY) programming prevents skill regression during summer breaks by continuing targeted instruction aligned to each student's IEP goals. Hearst Elementary School in neighboring Del Cerro is one of several SDUSD campuses that refer students to Sierra School when a district placement evaluation determines that a specialized setting better serves the child's educational plan. Private-pay enrollment is also available for families outside the district-referral pathway, and the campus maintains wheelchair accessibility at both the entrance and the parking lot.