AS an instructor in a culinary program we have to get through the demos and production set by the syllabus. When I say watch that clock - you have to do that or you are not going to get the info covered for them to be able to be successful in the next class. I keep it very light in my class and tell stories, jokes and experiences BUT I do tell them that if we are getting slowed down by anything that I will have to cut things short and that they are more than welcome to stay after to discuss question of confirm anything they are unsure of telling them to WRITE IT DOWN so that they remember later.