[ksaj]

When I used to teach at IBM, one of my favourite bits of recurring feedback was that I only use slides as a guide. It is the presenter's job to give context, which allows you to read the audience and go on anecdotal excursions when you know they're receptive to it, and it'll help them retain any new bits of knowledge. Some audiences are already familiar with bits of the material, so why batter them over the head with it just because you decided to spell it out verbatim in the visual material? Besides, reading the screen to the audience means you aren't paying enough attention to them to even know what parts they may be struggling with.