Mathnasium of Mission Gorge is a math-only tutoring center at 10330 Friars Road, Suite 109, in Grantville, San Diego, serving students in grades 1 through 12 with both in-center and online instruction built on the proprietary Mathnasium Method. Owner and center director Tommy Najarian transitioned from a career in the aerospace and defense industry after discovering a teaching vocation while tutoring underrepresented college students in math and physics, and the center has operated in the 92120 ZIP since 2009. The center sits in the Riverdale Shopping Center off Mission Gorge Road in the same plaza as In-N-Out and Starbucks, and parents dropping students for afternoon sessions stage in the same corridor that runs coffee pickups at Better Buzz Coffee Mission Gorge & Zion during the tutoring window. Each enrollment begins with a diagnostic assessment that maps a student's current skill level, foundational gaps, and academic goals, producing a customized learning plan that progresses through arithmetic, algebra, geometry, trigonometry, pre-calculus, and higher-level high school math at the student's pace. The Mathnasium Method builds number sense through a sequence of guided and independent problem sets, moving from concrete manipulation to abstract reasoning, and the instructors — including SDSU and University of San Diego students majoring in engineering and mathematics — work face-to-face with small groups to correct conceptual errors in real time. The after-school enrollment pipeline draws from Allied Gardens, Del Cerro, San Carlos, and the Grantville feeder schools within San Diego Unified and nearby charter and private campuses. Programs segment into Catch Up for students below grade level, Keep Up for on-pace learners needing reinforcement, and Get Ahead for students working above their current coursework, with Math Facts drills and standardized test preparation layered into each track. The center serves families across Grantville's after-school activity network, which includes swim instruction at SwimCademe and martial arts programs in the same commercial corridor. Summer sessions run a condensed curriculum designed to prevent regression over the break, and the homework-help component dedicates a portion of each visit to addressing the student's current school assignments alongside the Mathnasium plan.