Do you know - I never even thought of this. I was at school such a long time ago, and have mercifully blanked out many of the details, and I have never taught school myself. I have suddenly developed a severe case of retrospective appreciation for the fact that I had control over the amount of time spent on each learning point in the years I spent as a trainer. The flexibility of being able to focus on what was necessary for each particular group, and the capacity to fit breaks in with what was going on in the classroom were things I took far too much for granted. My respect for teachers has just increased... again!