Marilla Lakeside Early Advantage Preschool Programs in Lakeside operates from its dedicated campus on Marilla Drive as the primary early-childhood satellite of the Lakeside Union School District. The campus offers Traditional English, Spanish Enriched, and state-funded preschool tracks that prepare two- through five-year-olds for kindergarten entry at LUSD elementary feeders including Riverview Elementary School on Winter Gardens Boulevard. Special Education services for children from birth through age five operate alongside the general preschool program, addressing developmental milestones through individualized support plans. Wraparound care extends the instructional day for families enrolled in tuition-based programs, and enrichment options include movement-based activities similar to youth gymnastics programming at Gym Trix on Tavern Road in Alpine. The campus holds Community Care License number 376701097 with a maximum capacity of 97 children across its morning and afternoon class sessions.