I am an experienced teacher who owes practically all his knowledge in mathematics, physics, chemistry and computer science to a few great men from the Ecole Polytechnique of the ULB who I learned recently were no longer of this world and to whom I would like to pay tribute here: Professors Dubus, Maun, Winand, Legros, Beauwens and those for whom I already knew: Professors Sergijsels, Beaufays, Vanhauwermeiren, Devoogt as well as those who are still in this world. I taught at the ULB Tutoring Unit for 3 years and in secondary school for 7 years. I gave private lessons for university students for 2 years. I was a teacher of mathematics and physics at the Bilingual College of Dakar (French system) for the Mission Laïque Française based in Paris and active in more than 94 countries around the world. I therefore taught at all levels, and varied subjects, ranging from "classical" mathematics to the resolution of Schrödinger equations for complex nuclear systems existing outside our galaxy. I therefore have a long experience of courses at all levels up to engineering schools and beyond. I think I'm a pretty good "uncocker" for those who find themselves a little drowned in math programs or complex university problems.