My solution to this was simple: Tell my teachers/professors/whoever that I physically can't do it. My stutter gets way too bad when public speaking - So not only is it embarrasing, it's also an inaccurate demonstration of my actual verbal communication skills. Especially if I'm being graded for it. They can't make you run if you're in a wheelchair; They can't make you speak if you have a speech impediment. Make that clear. Don't just accept an "Oh, but everyone is nervous." Because it IS worse for you. You can, of course, still do it; but make it clear that you don't fully agree with being forced to. Make it clear before your presentation that you stutter, that you don't care and are going to do the presentation anyways.