There is a significant difference when you stand up in front of two hundred people to give a single presentation or a lecture, and when you stand up in front of ten trainees, for giving a three months course. Especially an ICT course, where much of the time you have to be clicking on the right place and not making mistakes, because people use to panic, when noticing red alert messages. This latter, compared to the first, feels more like a relationship - long lasting, well planned, with predicted results. And actually, a long lasting knowledge that has to come out of all that.