Hi there! My name is Richard Han. I earned my PhD in Mathematics from the University of California, Riverside. I have extensive teaching experience: 6 years as a teaching assistant at University of California, Riverside, over two years as a faculty member at Western Governors University, #1 in secondary education by the National Council on Teacher Quality, and as a faculty member at Trident University International. My expertise includes calculus and linear algebra. I am an instructor on Udemy for the courses Linear Algebra for Beginners: Open Doors to Great Careers, Linear Algebra for Beginners: Open Doors to Great Careers 2, Calculus (Calculus 1; Calculus A; Differential Calculus), and Philosophy of Language: Intriguing Puzzles and Paradoxes.