I graduated from Colorado State University in May 2000 with MS in computer science and in May 2004 with a PhD in mathematics. I have taught mathematics and computer science at Colorado State University and Emory University. The courses I have taught include pre-calculus, calculus 1-3, business calculus, AP calculus, linear algebra, differential equations, discrete mathematics, Java programming, algorithms and data structures, college algebra, etc. I have been an AP reader of Computer Science A for a few years. Besides teaching, I am also enjoy tutoring at my free time. While most students learn by reading examples and solving problems, I, as experienced teacher and tutor, guide students learning by nurturing their interest, helping them understand the WHY in addition to HOW.