Any class I had in college, I self-imposed that constraint on myself. Well, more 'no words'. And yes, I think it helped tremendously. That said, my more genera

Any class I had in college, I self-imposed that constraint on myself. Well, more 'no words'. And yes, I think it helped tremendously. That said, my more general rule of thumb is "Is this something I would have bothered to make a colored transparency, costs and all, if this was thirty years ago?" If it -is-, by all means, make a slide. If it isn't, don't make a slide of it. If you're not certain, because it's something like an outline that you feel is necessary to follow your logic, or similar, make a handout of it, so that users can look at it -if they need to-, and it doesn't steal your focus.