Mathnasium is a global educational franchise specializing in math tutoring for students from elementary through high school. They make money by offering personalized learning plans and one-on-one instruction through both in-center and online sessions, charging monthly membership fees. Founded in 2002 by Larry Martinek, Mathnasium has grown to over 1,000 locations worldwide, emphasizing a proprietary teaching method designed to boost students' confidence and academic performance in mathematics.