I summarize my experience from having taught simulation to over 7000 students for over 30 years; to undergraduate, graduate and Ph. D. business students, executives and high school students, in five countries. I discuss how my students differed from other simulation students and my general teaching goals. I answer the question of why Discrete Events Simulation is important at a business school. I present the five main types of course modules that I have taught. I finally discuss my choice of DES software, explaining why I have chosen to use a streamlined GUI based version of GPSS, WebGPSS.