Mr. McMcMc (voiced by Maurice LaMarchie in the pilot and Rip Taylor in the rest of the series) is Robot Jones's math teacher. He is the teacher that is seen most often and has the most lines. He is a Math Teacher which is Robot's favorite subject. Robot has already passed his class and ran out of assignments for Robot. They spend the rest of the time arguing with each other which results in Robot being sent to the principal's office.