A presentation I made for a quick and dirty introduction to what impact factor is, how it is calculated, where to find it, and some discussion of its problems. The class might have had 10 students in it (max), but it was very difficult to engage them in a discussion about what kinds of flaws the measure might have, or how else you might measure it. I went into the audience and sat next to the students until they started participating! Might as well make them feel awkward, too.